CD 190-205

Transposition (multiple side wire grooves)

CD 190/191

CD 190/191

Size: 92mm x 111mm (3.625" x 4.375")

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Years produced: c.1910s-1930s
Style (CD) scarcity: 7, 1,000+ but desirable shape
Intended use: Telephone Transposition
Style / catalog number: 50
Number of unique insulators: 45
Notes: Used to transpose lines to prevent cross-talk on the line.

Primary Embossing = Embossing on the front of the insulator, usually is that manufacturers name or the customers name. No embossing units will be noted as NO EMBOSSING. Units with no name but with numbers or letters will be noted as NO NAME.

Examples:
HEMINGRAY
S.B.T.&.T.Co
NO NAME
NO EMBOSSING

EIN = Embossing Index Number is a standardized way to identify each unique embossing.

(FS) = Front Skirt
(RS) = Rear Skirt
(DO) = Dome
(CR) = Crown
(FC) = Front Crown
(RC) = Rear Crown
(BG) = Between Grooves
(FA ) = Front, Above wire groove
(FB) = Front, Below wire groove
(BE) = Base Embossed
(FU) = Front Umbrella
(RU) = Rear Umbrella
(FCE) = Front Center
(RCE) = Rear Center
(TE) = Top Ear
(TOP) = Top of Pinhole
/ = Next line of embossing

There are unique characteristics of the insulator that are not related to the embossing, but is worth noting.

Examples:
Factory molded brass bushing
Flaired skirt
MLOB = Mold Line Over Base
Waffle top
Wide saddle groove

Base = the bottom of the insulator. It is noted in the following standardized ways.

SDP = Sharp Drip Points
RDP = Round Drip Points
CB = Corrugated Base
SB = Smooth Base

= Insulator has been verified that exists
= Insulator has been verified that exists, but not listed in the "guide"
= Insulator has not yet been verified as existing
= Suspected error listing in the "guide" because listing does not match up with known manufacturing practices. Such as numbers and dots on an aqua insulator, or insulators listed with both factory molded brass bushing and without. Many do not come in both configurations and are listed as coming in both. Etc.

Color = The approximate color of the insulator. Due to manufacturing variations, insulators with the same color name maybe slightly different in actual appearance.

Primary Embossing EIN Embossing Special Features Base Color Verified?

AM.TEL.&TEL.CO.

[010]

(CD 191 Top) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION

SB

Aqua

AM.TEL.&TEL.CO.

[010]

(CD 191 Top) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION

SB

Blue

AM.TEL.&TEL.CO.

[010]

(CD 191 Top) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION

SB

Green

AM.TEL.&TEL.CO.

[010]

(CD 191 Top) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION

SB

Hemingray Blue

AM.TEL.&TEL.CO.

[010]

(CD 191 Top) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION

SB

Ice Aqua

AM.TEL.&TEL.CO.

[010]

(CD 191 Top) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION

SB

Jade Green Milk

AM.TEL.&TEL.CO.

[010]

(CD 191 Top) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION

SB

Milky Aqua

AM.TEL.&TEL.CO.

[015]

CD 191 Top) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITION/(TON blotted out, Blot out on base only)

SB

Aqua

AM.TEL.&TEL.CO.

[020]

(CD 191 Top) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITON (Note spelling) (CD 190 Bottom) (FS) AM.TEL.& TEL.Co. (RS) TWO PIECE/TRANSPOSITON (Note spelling)

SB

Aqua

HEMINGRAY

[010]

(CD 191 Top) (FS) HEMINGAY-50 (Note spelling) (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGAY-50 (Note spelling) (RS) MADE IN U.S.A.

SB

Aqua

HEMINGRAY

[010]

(CD 191 Top) (FS) HEMINGAY-50 (Note spelling) (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGAY-50 (Note spelling) (RS) MADE IN U.S.A.

SB

Blue Aqua

HEMINGRAY

[010]

(CD 191 Top) (FS) HEMINGAY-50 (Note spelling) (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGAY-50 (Note spelling) (RS) MADE IN U.S.A.

SB

Hemingray Blue

HEMINGRAY

[020]

(CD 191 Top) (FS) HEMINGRAY (RS) NO 50 (CD 190 Bottom) (FS) HEMINGRAY (RS) NO 50

SB

Aqua

HEMINGRAY

[020]

(CD 191 Top) (FS) HEMINGRAY (RS) NO 50 (CD 190 Bottom) (FS) HEMINGRAY (RS) NO 50

SB

Green Aqua

HEMINGRAY

[020]

(CD 191 Top) (FS) HEMINGRAY (RS) NO 50 (CD 190 Bottom) (FS) HEMINGRAY (RS) NO 50

SB

Milky Aqua

HEMINGRAY

[030]

(CD 191 Top) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A.

SB

Aqua

HEMINGRAY

[030]

(CD 191 Top) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A.

SB

Blue

HEMINGRAY

[030]

(CD 191 Top) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A.

SB

Blue Aqua

HEMINGRAY

[030]

(CD 191 Top) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A.

SB

Clear

HEMINGRAY

[030]

(CD 191 Top) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A.

SB

Green Aqua

HEMINGRAY

[030]

(CD 191 Top) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A.

SB

Green Tint

HEMINGRAY

[030]

(CD 191 Top) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A.

SB

Hemingray Blue

HEMINGRAY

[030]

(CD 191 Top) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A.

SB

Ice Blue

HEMINGRAY

[030]

(CD 191 Top) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A.

SB

Ice Green

HEMINGRAY

[040]

(CD 191 Top) (FS) HEMINGRAY-50/(Numbers and dots) (RS) MADE IN U.S.A./(Number) (CD 190 Bottom) (FS) HEMINGRAY-50/(Numbers and dots) (RS) MADE IN U.S.A./(Number)

CB

Clear

HEMINGRAY

[050]

(CD 191 Top) (FS) HEMINGRAY-50/(Numbers and dots) (RS) MADE IN U.S.A./(Number) (CD 190 Bottom) (FS) HEMINGRAY-50/(Numbers and dots) (RS) MADE IN U.S.A./(Number)

SB

Aqua Tint

HEMINGRAY

[050]

(CD 191 Top) (FS) HEMINGRAY-50/(Numbers and dots) (RS) MADE IN U.S.A./(Number) (CD 190 Bottom) (FS) HEMINGRAY-50/(Numbers and dots) (RS) MADE IN U.S.A./(Number)

SB

Blue Tint

HEMINGRAY

[050]

(CD 191 Top) (FS) HEMINGRAY-50/(Numbers and dots) (RS) MADE IN U.S.A./(Number) (CD 190 Bottom) (FS) HEMINGRAY-50/(Numbers and dots) (RS) MADE IN U.S.A./(Number)

SB

Clear

HEMINGRAY

[060]

(CD 191 Top) (FS) HEMINGRAY-50/(Numbers) (RS) MADE IN U.S.A. (CD 190 Bottom) (FS) HEMINGRAY-50/(Numbers) (RS) MADE IN U.S.A.

SB

Ice Blue

HEMINGRAY

[070]

(CD 191 Top) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A./(NO 50 blotted out) (CD 190 Bottom) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A./(NO 50 blotted out)

SB

Aqua

HEMINGRAY

[070]

(CD 191 Top) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A./(NO 50 blotted out) (CD 190 Bottom) (FS) HEMINGRAY-50 (RS) MADE IN U.S.A./(NO 50 blotted out)

SB

Hemingray Blue

TWO PIECE TRANSPOSITION

[010]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (RS) (AM.TEL.& TEL.CO. blotted out) (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION (RS) (AM.TEL.& TEL.CO. blotted out)

SB

Aqua

TWO PIECE TRANSPOSITION

[020]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION

SB

Aqua

TWO PIECE TRANSPOSITION

[020]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION

SB

Blue

TWO PIECE TRANSPOSITION

[020]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION

SB

Blue Aqua

TWO PIECE TRANSPOSITION

[020]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION

SB

Green Aqua

TWO PIECE TRANSPOSITION

[020]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION

SB

Hemingray Blue

TWO PIECE TRANSPOSITION

[020]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION

SB

Ice Blue

TWO PIECE TRANSPOSITION

[020]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION

SB

Light Aqua

TWO PIECE TRANSPOSITION

[020]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION

SB

Milky Green Aqua

TWO PIECE TRANSPOSITION

[030]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITON (Note spelling) (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITON (Note spelling)

SB

Aqua

TWO PIECE TRANSPOSITION

[030]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITON (Note spelling) (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITON (Note spelling)

SB

Milky Aqua

TWO PIECE TRANSPOSITION

[040]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION (RS) (Blotted out embossing)

SB

Aqua

TWO PIECE TRANSPOSITION

[040]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION (RS) (Blotted out embossing)

SB

Gray Green

TWO PIECE TRANSPOSITION

[040]

(CD 191 Top) (FS) TWO PIECE/TRANSPOSITION (CD 190 Bottom) (FS) TWO PIECE/TRANSPOSITION (RS) (Blotted out embossing)

SB

Sage Green

  • [010] - Milky Aqua

    AM.TEL.& TEL.CO.

    [010]

    Milky Aqua

  • [030] - Hemingray Blue

    HEMINGRAY

    [030]

    Hemingray Blue

  • [020] - Light Aqua

    TWO PIECE TRANSPOSITION

    [020]

    Light Aqua

  • [020] - Sage Green

    TWO PIECE TRANSPOSITION

    [020]

    Sage Green

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