The Vintage Wrist Watch Company has dated this piece to the 1930s.
The watch has a calibre 123 17-jewel hand-winding movement which is working nicely. Unusually, the movement is gold plated. It is fully signed and has the letters GXC from when it was imported into the US
The Quadron was introduced by Gruen in 1925. Previous rectangular or tonneau shaped watches had a round movement but a larger movement that went into all four corners, such as this, was more reliable and rugged, with an improved performance.

Whilst not all watches in the Quadron family were marketed as such, this is how they were referred to internally at Gruen.
This particular watch measures 22mm wide excluding the winding crown and 32mm high excluding the lugs so it would suit a man with a slimmer wrist. The case is 10kt gold filled and overall is in good condition for such an early piece, a surface scratch to the back but otherwise very acceptable.

The inside of the case back is signed with the Gruen name, and it also has the code 123-247 which confirms the case and calibre number tie up, and the style code dates it back to 1936.
The glass lens has three very small marks.

The signed dial is in its original finish and the hour and minutes hands have been confirmed as original after referencing other examples of the design.
A new leather strap has been fitted.
The watch comes in a new presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1930s.
Specialists in antique and vintage wrist watches and pocket watches
You can view the stock and full dealer information on the The Vintage Wrist Watch Company Profile Page