I recently purchased a silver laquered, 1971 Conn trumpet. I can not figure out which model it is. It is all silver laquer, has a 1971 serial number, has "Japan" stamped on second valve. The thing that stumps me is that there is no other markings anywhere on the horn, other then the Conn marching band stencil with shooting stars, and the bell is 4 5/8" across, and it also has the first slide trigger. The closest horn that I see to this is the 36b Connstellation, but my horn is all silver laquer, not gold, or gold and silver mix. Help if you can, my head is spinning.