Mystery Drum?

Dear Mr. Lawrence,
Attached are some pics of a drum I bought recently at Century Drum Shop here in Toronto. 13.25", metal shell with wrap, original calf heads top and bottom. Note the interesting snare strainer (very smooth), and the quality of the workmanship.
We think it might be a 1930's era Sonor, but there is no brand on it. If you or your readers can identify it, or tell me where to look, I would appreciate it.
Thank you.
Bruce Philp
Slingerland Endorsee
Glenn Miller Orchestra, 1966