Well, if Buescher hadn't gone out of business in 1963, there might be. Unfortunately, there isn't, and it's a matter of gathering subjective opinions based on a number of factors including the condition of the engraving -- so here's mine.
Given the clarity of the serial number stamping and the complete lack of silver embedded in the recesses, I'd say it was a bare brass horn to start with, and the lacquered post production at least once in its life.
Others may differ, but it seems likely.
1926 Buescher Model 122 True Tone Series III Gold Plated Soprano
1936 Buescher Model 139 Custom Built Bare Brass Baritone
1938 Buescher Model 127 Aristocrat (Art Deco) Tenor
1938 Buescher Model 139 Aristocrat Gold Plated Baritone
1947 Buescher Model B-11 400 (Top Hat & Cane) Bare Brass Tenor
1949 Buescher Model B-7 400 (Top Hat & Cane) Silver Plated Alto
1949 Buescher Model 140 Aristocrat (Big B) Lacquer Alto
1949 Buescher Model 156 Aristocrat (Big B) Gold Plated Tenor
1970-something Yamaha Model YBS-61 Baritone
Morgan, Ishimori, Strathon, and Theo Wanna Mouthpieces.
Nothing works so well in gathering information as a display of ignorance. I've been learning a lot lately.
That makes sense madden