Hi John, welcome to the forum and as a fellow Michigander. I too enjoy vintage horns, and while not an expert, can give you some ideas. Go to Ebay-musical instruments-cornet/trumpet and specify Getzen and take a look at what is up for bids. Of the one's there currently you might check out:
Getzen Capri 580S Cornet
Getzen Super Deluxe Trumpet
Getzen 90 Deluxe
Others:
Getzen 80 cornet and Super Deluxe
Getzen 90 cornet and Super Deluxe
Trumpets:
Getzen Renaissance
Getzen Super Deluxe Tone Balanced
Gerzen 90
I'm sure others more knowlegeable than I will add more specifics.
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Dave Rafferty
07 Barrington Trumpet,
1972 Reynolds Medalist
55 Besson 8-10 trumpet
55 Roth by Reynolds Cornet
73 Olds Ambassador Cornet
30's Czech small bore Trumpet
Getzen 80 cornet,
33 American Standard cornet
www.kalamazooconcertband.org