Hemingray.info Glass Insulator Database: CD 121.4

CD 121.4

Insulator Facts

Dimensions:	4 3⁄8" H × 2 3⁄4" W
Primary Embossings:The Primary Embossing is typically found on the front of the insulator and usually identifies either the manufacturer (such as "Hemingray") or the company that the insulator was made for (such as "AM.TEL.&TEL.CO.") Insulators with No Name or No Embossing are denoted as such.	A.U. NO EMBOSSING PATENT - DEC. 19, 1871
Years Produced:	c.1880s
Rarity Scale 0. No specimens known 1. Extremely Common (millions known) 2. Very Common 3. Common 4. Fairly Common 5. Uncommon 6. Very Uncommon 7. Rare (dozens known) 8. Very Rare (less than a dozen known) 9. Extremely Rare (2 or 3 known) 10. Unique (only one known)	Uncommon (5/10)
Usage:	Telegraph
Value Range: This is an estimated value range only, based on historical hobby collecting data. Insulator values vary widely depending on many factors, including embossing, color, condition, mold variations, manufacturing anomalies, and other attributes. Please visit the Hemingray Values page for more information.	$40-500

Insulator Overview

This is one of a couple of early style insulators that were produced by Hemingray for American Union (A.U.) See also CD 126.3.

Known Embossings (8)

Primary EmbossingThe Primary Embossing is typically found on the front of the insulator and usually identifies either the manufacturer (such as "Hemingray") or the company that the insulator was made for (such as "AM.TEL.&TEL.CO.") Insulators with No Name or No Embossing are denoted as such.	EINThe Embossing Index Number (EIN) is a unique number assigned by the collecting hobby to each distinct embossing for an insulator design. It is normally shown in brackets, e.g. [050].	EmbossingMost common terms: (F-Skirt): Front Skirt (R-Skirt): Rear Skirt /: New line of embossing {}: Special note (not embossed on the insulator) [#]: Represents a number Other terms: {MLOB}: Mold Line Over Base (F-Crown): Front Crown (R-Crown): Rear Crown (F-Umbrella): Front Umbrella (R-Umbrella): Rear Umbrella	BaseThe base is the bottom of the insulator. Hemingray made 4 different types of bases: 1. SDP: Sharp Drip Points 2. RDP: Round Drip Points 3. CB: Corrugated Base 4. SB: Smooth Base	Year AddedThis is the year that this embossing was officially recognized and added to the McDougald (1991-2008) or Briel (2011-2023) insulator price guides. It is not necessarily the year this embossing was discovered.	Photo	Status✓ = In my collection If the value in this column says WANTED, then that specific insulator is on my wanted list! If you have that insulator and would like to sell it, click on the WANTED link to submit photos and contact me.
A.U.	[010]	(F-Crown) PATENT/DEC.19.1871 (F-Skirt) A.U.	SB	-		✓
A.U.	[020]	(F-Crown) PATENT/DEC.19.1871 (F-Skirt) A.U. (R-Skirt) ['B','C','D', 'E', or '{Backwards E}']	SB	-		✓
A.U.	[040]	(F-Crown) PATENT/DEC.19.1871 (F-Skirt) A.U. {Missing bar in 'A'} Note: EIN changed from [080] to [040] in the 2019 price guide.	SB	-	No Photo	WANTED
A.U.	[050]	(F-Crown) PATENT/DEC. 19. 1871 (F-Skirt) A.U. {Missing bar in 'A'} (R-Skirt) ['E']	SB	2019	No Photo	WANTED ($50 Reward)
NO EMBOSSING	[010]	[No embossing] Note: This embossing is a suspected, but unconfirmed, Hemingray product.	SB	-	No Photo	WANTED ($200 Reward)
PATENT - DEC. 19, 1871	[010]	(F-Crown) PATENT/DEC.19.1871 (F-Skirt) ['A.U.' blotted out] {MLOB} Note: Until 2015, this embossing was listed as A.U. [040].	SB	2015		✓
PATENT - DEC. 19, 1871	[020]	(F-Crown) PATENT/DEC.19.1871 (F-Skirt) ['A.U.' blotted out] (R-Skirt) [Blotted out embossing] Note: Until 2015, this embossing was listed as A.U. [050].	SB	2015	No Photo	WANTED
PATENT - DEC. 19, 1871	[030]	(F-Crown) PATENT/DEC.19.1871 (F-Skirt) ['A.U.' blotted out] (R-Skirt) ['D', 'E', or '{Backwards 'E'}'] Note: Until 2015, this embossing was listed as A.U. [060].	SB	2015		✓

Removed Embossings (2)

The following embossing(s) were removed from the price guide because they could not be verified to exist, were consolidated with other embossings, or were otherwise ambiguous/inaccurate. They are preserved here for historical purposes.

Primary EmbossingThe Primary Embossing is typically found on the front of the insulator and usually identifies either the manufacturer (such as "Hemingray") or the company that the insulator was made for (such as "AM.TEL.&TEL.CO.") Insulators with No Name or No Embossing are denoted as such.	EINThe Embossing Index Number (EIN) is a unique number assigned by the collecting hobby to each distinct embossing for an insulator design. It is normally shown in brackets, e.g. [050].	EmbossingMost common terms: (F-Skirt): Front Skirt (R-Skirt): Rear Skirt /: New line of embossing {}: Special note (not embossed on the insulator) [#]: Represents a number Other terms: {MLOB}: Mold Line Over Base (F-Crown): Front Crown (R-Crown): Rear Crown (F-Umbrella): Front Umbrella (R-Umbrella): Rear Umbrella	BaseThe base is the bottom of the insulator. Hemingray made 4 different types of bases: 1. SDP: Sharp Drip Points 2. RDP: Round Drip Points 3. CB: Corrugated Base 4. SB: Smooth Base	Year Removed
A.U.	[030]	(F-Crown) PATENT / DEC. 19. 1871 (F-Skirt) A.U. / [Letter] (R-Skirt) [Letter]	SB	2008
A.U.	[070]	(F-Crown) PATENT / DEC. 19. 1871 (F-Skirt) ['A.U.' blotted out] / [Letter]	SB	2008

Known Colors (8)

ColorThe color of the insulator.
Aqua
Blue
Green
Green Aqua
Ice Green
Light Aqua
Light Green
Yellow Green