These watches have been included as examples of other companies imitating Rolex designs.
The mechanisms of the Gruen watches were made by Aegler who was also Rolex's movement maker.
A steel rectangular jump-hour wristwatch
SIGNED GRUEN GUILDITE, MODEL NO. 1771, CASE NO. 19965, 1930S
Details
A steel rectangular jump-hour wristwatch
Signed Gruen Guildite, model no. 1771, case no. 19965, 1930s
The nickel plated movement signed Gruen Guild jewelled to the third with bimetallic balance, adjusted, numbered 1958708, the black dial with square Arabic minute chapter, apertures for the hour and large subsidiary seconds, the rectangular case with chamfered shoulders and bezel and snap on back, case, dial and movement signed
41 x 20 mm.
Signed Gruen Guildite, model no. 1771, case no. 19965, 1930s
The nickel plated movement signed Gruen Guild jewelled to the third with bimetallic balance, adjusted, numbered 1958708, the black dial with square Arabic minute chapter, apertures for the hour and large subsidiary seconds, the rectangular case with chamfered shoulders and bezel and snap on back, case, dial and movement signed
41 x 20 mm.