There were about 55,000 DR's made without serials. Just sayin'
Plus all those non-serial number DRs were produced before Gillette started using the diamond logo in 1908, so maybe...
There were about 55,000 DR's made without serials. Just sayin'
It does appear to say Pat. Apl'd For.
It's brass not copper. The baking soda and foil is the method I used on my Single Ring, and is what I would use again if I get another silver plated razor.
I would like to hear from a few more people who know more than I do, but I think you have a 1903-1904 Gillette Double Ring. Kind of a holy grail razor there. I would probably leave it as original as possible if it was me. Don't try to straighten the teeth yourself. You could probably send it out to a pro or at least get there opinions on whether to do it or not.
Bummer about the crack, but considering that razor is about as old as a Wright Flyer and has probably seen decades of use, I think it looks pretty good. That razor has about as much character as I've seen here. Thanks for showing us such a unique piece!