GTs58
I'm the Wiz, and nobody beats me!
Just like automobile manufacturers, production for a given bike for a given year is started during the last months of the preceding year. So the production of 1955 bikes was started back in 1954. If you look through all of the Schwinn brochures, you'll see that Schwinn DID NOT manufacture a middleweight for the 1954 year; the first year for middleweight models was 1955. Your bike is more than likely an early 1955 built in 1954.
See my post, # 29 page 2. The Tiger and the Corvette were on a few dealers floors and they were being sold at least by June 1954. Like the first Mustangs, they're 54 1/2 models. lol