Conn Trombone serial number

[amenpash]

Hello
I am trying to identify the manufacturer date of a GC Conn 48H, but the initial of my serial number isn't list in Conn serail number list.
My serial is GJ770119.
Thank you

[CalgaryTbone]

OK - 3rd try - my responses aren't going through.

Try the "Conn Loyalist" site - usually good info on serial and model numbers.

Jim Scott

[BGuttman]

Note:

First character is decade: G=1970s
Second character is month: J= Month 10 (October)
First digit is year within decade: 7
Made October, 1977

[Briande]

Note:

First character is decade: G=1970s
Second character is month: J= Month 10 (October)
First digit is year within decade: 7
Made October, 1977

Exactly. That info is also at the bottom of this page: https://www.horn-u-copia.net/serial/Connlist.html