Another nice Waltham, Model 1883, also with a named grade, this time "Sterling." Made 1908. A big one at Size 18, 15 jewels, no adjustments, so not as good as my Riverside. Pendant wind and set.
The case is gold but I don't know what type; from the Philadelphia Watch Case Co., guaranteed 10 years. I'm not sure but I believe the guarantee indicates the thickness of the gold plating or rolling based on wear in regular use.
Acquired: 2019
Circa: 1883
Current condition: runs fine