Description:  1931 Bertram

Model Name


Case Date


Case Serial


Signature Locations

Inside case, movement, dial

Case Signature Format

"Bulova Quality"


10AN, 17 Jewels, Unadjusted

Movement Date Code


Movement Serial


Case Material Description

None indicated (two tone gold with engraving)

Case Dimensions

36mm lug to lug x 24.6mm without crown

(29.3mm without lugs)

Case Type

Single hinged, rectangular with step

Crystal Specifications

21.75mm x 15.8mm, rectangular

Other Details

1927 patent date inside case

Dust shield and ring intact

NOTES:  The movement in this example is only 17-jewels, rather than the 21-jewels specified in the ad.  Yet, the case appears to be a match.  The very similar Conrad would appear to be the all silver version of this case.

1931 Bertram