60’s Model 10 Frame Finish Variation

[saintarctangent]

I have a 4" taper barrel model 10 that is smooth on the frame top (sight channel). My 60's 2" model 10 appears like a grit blast finish in same area. Is this an indication that my 4" taper barrel pistol was polished and refinished?

 

[alwslate]

Your 2" model 10's finish has been altered most likely.