re identification
The earlier "P"s should be T337GP.
BTW ICAO has changed references for the skymaster. You can file as a P337 which designates pressurized. I get the odd query "what is a "P" 337" from the controllers.
They also use T337 for turbo.
ICAO has dropped the "skymaster" designation but is still used in north america.
fyi
Bob
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