There are a few in the OVD, but I doubt more than 10% of the available references are listed. Most of the time they have one or two letters, followed by four numbers. Some of the more popular US based case makers Omega used were S&W, D&A, Wadsworth, Star and Jonell (J with a spear).
When I'm researching them, I try to find matching reference numbers using Google searches. Almost always brings me back to eBay.
Many Swiss watches exported to the US in the 1950's had just "Swiss" at the bottom of the dial. Could have been because while the movements were Swiss, some parts like the dials, hands and cases may have been made here instead. Not sure on this, but it's a theory and makes some sense..
I'm also a Hamilton collector and know decayed radium dials, and that sir, is not a decayed radium dial.
This is:
Take care,
gatorcpa
Click to expand...