Mouthpiece reciever/leadpipe engraving

Since I have a section devoted to bell engraving patterns, I think a leadpipe engraving section is worth inclusion, too [but it won't be as interesting].

1971 - ☆ DIRECTOR ☆ on leadpipe

Used on 19A-B/21A-B "Director" cornets-trumpets, and some 16A-Bs possibly due to old stock.

~1973-present - Model number on leadpipe

Started with the 16A [Director]; still on modern Conn 1B "Vintage One"s!