I have a Model 10 no dash, serial number C484103, 4 screw, with 4" tapered barrel and right-hand extractor rod. Would I be correct to say that the Model 10 with no dash were only made in 1957 and 1958, perhaps 1959?
I found a serial number table that showed 1961 for my number, but I think it cannot be correct. The Standard Catalogue says the 10-1 came out in 1959. Thanks!

I found a serial number table that showed 1961 for my number, but I think it cannot be correct. The Standard Catalogue says the 10-1 came out in 1959. Thanks!