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icon1.gif sticky: Gruen Movement Factories ( 1 2 3 4)
By: Jenneke on Sun, 27 October 2013
129 4722 Mon, 03 October 2022 18:38
By: Ephemerald
  sticky: Watch case makers used by Gruen ( 1 2)
By: JackW on Sat, 08 June 2013
68 2707 Wed, 13 December 2017 06:13
By: timeliz
  The birth of the XL Cartouche -- and a new supplier!
The story of the Mantouche
By: Case on Mon, 26 September 2022
13 278 Sat, 01 October 2022 01:52
By: Case
  What does the "F" mean?
By: Ephemerald on Fri, 09 September 2022
5 238 Fri, 16 September 2022 15:49
By: Ephemerald
  Origin of "Crown Guard"
By: Case on Thu, 01 September 2022
6 261 Mon, 12 September 2022 16:02
By: afire
  Patent 97101
Crown wheel design
By: Benjamin_Rush on Fri, 09 September 2022
4 146 Fri, 09 September 2022 23:46
By: Benjamin_Rush
  Strap 184 - Winged Disc
1927 Date
By: Benjamin_Rush on Sat, 13 August 2022
9 325 Mon, 15 August 2022 02:34
By: Case
  Gruen Production Numbers
Swiss court documents about Gruen production contract & fine embedded in transcripts of Extension Act of 1951.
By: Ephemerald on Mon, 16 September 2019
24 1428 Sat, 23 July 2022 03:28
By: Case
  Verithin patent?
By: Case on Sat, 16 July 2022
2 264 Sun, 17 July 2022 03:42
By: Case
  Glass jewels or rubies?
By: Jenneke on Fri, 17 June 2022
20 1040 Tue, 21 June 2022 16:01
By: Barney Green
  Pocket watch style numbers
By: Case on Tue, 10 May 2022
4 308 Sat, 14 May 2022 01:02
By: thesnark17
  How were OS crystals made?
By: Case on Sun, 23 May 2021
36 1749 Sat, 23 April 2022 20:07
By: Jenneke
  Gruen's Prize-Winning Marine chronometer
By: Case on Wed, 06 April 2022
1 160 Wed, 06 April 2022 14:59
By: afire
  Anomalous UltraThin movement
By: thesnark17 on Sat, 12 February 2022
34 1485 Tue, 05 April 2022 02:03
By: thesnark17
  Ladies Pan American Model Names
By: Ephemerald on Sat, 19 October 2019
4 313 Sat, 02 April 2022 21:44
By: shkirby
  Gents Pan American Model Names ( 1 2)
By: Ephemerald on Sat, 19 October 2019
53 2546 Thu, 27 January 2022 16:57
By: Jenneke
  Evans Watch sub-brand ?
By: mikey on Wed, 29 December 2021
3 241 Wed, 29 December 2021 18:22
By: GaryM
  Fifth Avenue Platinum Shop, Inc. 15 W 47th
5th Ave a division/subsidiary of Gruen Watch Makers Guild? ( 1 2)
By: Ephemerald on Sun, 06 January 2019
53 2076 Fri, 10 December 2021 22:43
By: Jenneke
  What does G or W inside case back mean? ( 1 2)
By: Barney Green on Fri, 07 August 2020
50 1928 Fri, 03 December 2021 09:35
By: Barney Green
  Gruen Trademarks
By: Case on Thu, 26 September 2019
31 1254 Mon, 29 November 2021 16:17
By: Case
  Gruen Baguette
"Slim and graceful...slender as a cigarette"
By: Ephemerald on Sun, 31 October 2021
4 377 Wed, 17 November 2021 05:40
By: Ephemerald
  157-8 vs. 157-8W: Decoding the "W"
By: Case on Fri, 01 November 2019
14 636 Wed, 20 October 2021 18:28
By: afire
  Updating Style Numbers start dates
By: Case on Wed, 22 September 2021
0 124 Wed, 22 September 2021 19:39
By: Case
  Conoruma balance introduction date
When did Gruen begin introduction of Conoruma alloy?
By: skirby on Wed, 13 August 2014
34 1328 Wed, 22 September 2021 03:27
By: JackW
  Developing the Tank / the Strap “Tank”
By: Case on Sat, 18 September 2021
11 678 Tue, 21 September 2021 15:11
By: afire
  The Launch of the first Quadron -- the Missing Strap Models 37-40
By: Case on Thu, 20 May 2021
32 1326 Mon, 20 September 2021 16:23
By: afire
  Serial numbers and production dates of Gruen Verithin pocket watches?
Dating Gruen Verithin pocket watches
By: shkirby on Sat, 24 July 2021
3 255 Mon, 26 July 2021 14:38
By: Case
  More Early Gruen info: 1894 to 1902
founding of Madretsch, offices, addresses, Queen City Watch Case
By: Case on Thu, 03 June 2021
3 219 Thu, 03 June 2021 22:26
By: Case
  Caliber 495SS
Did it exist?
By: Barney Green on Wed, 02 June 2021
5 271 Thu, 03 June 2021 17:28
By: Barney Green
  Dietrich Gruen patent model watch of 1887
By: Case on Wed, 14 April 2021
0 136 Wed, 14 April 2021 18:25
By: Case
  The "Extra Precision" calibers - a complete list?
By: Case on Mon, 05 April 2021
13 703 Tue, 13 April 2021 02:58
By: thesnark17
  What does OS inside case back mean? ( 1 2 3)
By: Jenneke on Mon, 20 May 2013
83 2740 Tue, 23 March 2021 16:43
By: Case
  The Master Book and Caliber 611
Huh?
By: afire on Thu, 22 October 2020
10 400 Sun, 01 November 2020 00:11
By: JackW
  Gruen metalware labels etc
By: Ephemerald on Wed, 02 September 2020
17 721 Fri, 11 September 2020 20:56
By: Ephemerald
  Norwood facility location/pics?
By: Case on Wed, 14 August 2019
13 425 Sat, 15 August 2020 13:36
By: GaryM
  Precision in diamond trademark date
By: Case on Thu, 26 September 2019
7 354 Mon, 10 August 2020 00:54
By: Case
  When did Gruen start using style numbers?
By: Case on Tue, 14 July 2020
1 162 Mon, 20 July 2020 21:55
By: Jenneke
  US dial makers used by Gruen
By: Case on Thu, 16 July 2020
2 220 Fri, 17 July 2020 02:54
By: Case
  Lavina's relation to Gruen
By: thesnark17 on Sat, 24 November 2018
14 543 Mon, 13 July 2020 20:53
By: thesnark17
  V-Series Serial Numbers by Year
By: Case on Thu, 18 June 2020
22 859 Thu, 25 June 2020 02:43
By: Case
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