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The caliber 410

Thu, 13 June 2013 20:47

This is the caliber 410, a 17 jewel movement that is 10.5 ligne or 23.7mm in diameter. Almost all parts will interchange with others in the 405-series. The only difference between the 410 and the 420 is the size; other wise it is fully interchangeable. These movements are always marked with the caliber number in the space next to the balance wheel and the cap jewel for the escape wheel.
Photo by timeliz (Thank you!)

The caliber database | 3 comments

The caliber 426

Thu, 13 June 2013 12:56

The image (from MikeyT) is the caliber 426, a 15 jewel movement that is tonneau-shaped and 9-3/4 ligne or 22mm in size. The caliber number is clearly stamped next to the balance wheel on the pillar plate. This is similar to the 425 (17-jewels) and like others in the 405-caliber series interchanges almost completely with the other 15-jewel versions.

The caliber database | 0 comments

"In the beginning..." (1877 Hunter model Pocket Watch)

Wed, 12 June 2013 15:31

...there was Columbus. Motivated by Art I thought it would be interesting for you WW folks to understand how it all started.

Model name : Pocket watch Laughing
Type : Hunter model
Period/date : 1877
Gender : Male

Case Maker : ? (No information found on "NÂș1" trade mark)
Case Material : Coin silver
Case Serial : M296
Case Style no :

Caliber : ? 15j 19 Ligne (approx. 16 size)
Movement Maker : Aeby & Landry, Madretsch
Movement Serial: 7265

Bracelet :

Other info :
Dietrich Gruen started production in 1876 under the name Columbus Watch Co.. This example is from the second year of production.
Interesting detail is the reference to Gruen's patented safety center pinion, which was a Gruen USP at the time.
The dial word mark is made up of the letters "CWCo" and has some similarity with the later "DSG" word mark.
Hand painted words on dial center most likely owners name, but too damaged to be able to read.


1910's and prior | 4 comments


1895-1903 GRUEN SPECIFIED MOVEMENTS; Wed, 12 June 2013 08:20

1895-1903 Assmann movements specified by Dietrich Gruen. Hunter and open face 18s,16s,10s. Best quality Gruens.

1910's and prior | 13 comments

Long case Regal 1939

First deiberate purchase for Curvex collection; may be best one.; Tue, 11 June 2013 22:51

A single bidder ebay offer some months past is first long case Curvex for me. Shown here with well known 1937 Gruen ad featuring its gold fill case version Royalty. This one 14k case Regal with original plated metal band. Dial seems original. Was well used but solid golds survive better. Plated band and dial show its 1939 age.


1930's | 1 comment

Ladies Cartouche 384

Sat, 08 June 2013 18:12

Model name : 384
Type : Cartouche
Period/date : 1930ish
Gender : Ladies

Case Maker : Gruen-Cincinatti
Case Material: 14k GF
Case Serial : 2052427
Case Style no: 74

Caliber : 835
Movement Maker: Aegler
Movement Serial: 18292423

Bracelet : Durobrite SS link

Other info : Overhauled in Jan 2013, excellent runner.

Edit: Info updated, thanks Barney!


1930's | 2 comments

Ladies Cartouche up for ID

Sat, 08 June 2013 18:06

Model name : Unknown
Type : Cartouche
Period/date : early 30's ?
Gender : Ladies

Case Maker : Wadsworth
Case Material:Ultra Quality
Case Serial : 807843
Case Style no : OS-65

Caliber : 835
Movement Maker : Aegler
Movement Serial: 1776663

Bracelet : 10k GF Champion expansion

Other info : New R2205 crystal from DarHin, keeps excellent time.


1930's | 0 comments

'47 Veri-Thin "Yale"

Fri, 07 June 2013 21:56

Model name : Yale
Type : Veri-Thin
Period/date : 1947
Gender : Mens

Case Maker : Gruen
Case Material: Guildite
Case Serial : 9049181
Case Style no: 553

Caliber : 426
Movement Maker : Gruen
Movement Serial: A732034

Bracelet : 16mm Double ribbed leather

Other info : Runs & keeps time. Needs a cleanup. Inside case-back pic to follow


1940's | 3 comments

Veri-Thin "Dr. Pepper"

Wed, 05 June 2013 20:42

Model name : "Dr. Pepper"
Type : Veri-Thin
Period/date : approx. 1948
Gender : Male

Case Maker : Wadsworth
Case Material : 10k Gold Filled
Case Serial : G836943
Case Style no : 420SS/543

Caliber : 420SS
Movement Maker : Gruen
Movement Serial: B189946

Bracelet :

Other info :
Odd dial that apparently was produced for "Dr. Pepper" as award or promotion watch for employees, but that is about all I know about it.


1940's | 12 comments

Curvex Majesty (370)

Tue, 04 June 2013 07:03

Model name: Curvex Majesty
Type: Curvex
Period/date: 1950-52
Gender: Mens
Case Maker: Wadsworth
Case Material: 14Karat Gold
Case Serial:
Case Style no: 370 602

Caliber: 370 Curve-a-Metric
Movement Maker: Gruen
Movement Serial:

Other info: 43mm long, second model (AFAIK) to be called Curvex Majesty. Longest of the solid gold 370s. Faceted crystal causes some distortion in images.

1937 Majesty and 1950 Majesty side by side...

1950's and Up | 1 comment

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