
I don't have the energy to debate this... all these answers are available online or call you local CBSA office.
Or you could just read the stickies, follow the link to the actual legislation, and learn something, apparently something new, even.
Then read through the flow chart that 41Colt did up. It's a pretty useful tool.
The actual date of manufacture is the only date that matters. Made before the date, AND not in one of the listed calibers, and it is a Prescribed Antique. If you get the one that was listed as the last one made on the day the cut-off was randomly applied, and the first one made the next day, as a sequential numbered set, one will and the other will not be a Prescribed Antique, provided that they are both chambered for cartridges that are not on the list in the law.
Any handgun chambered in one of the cartridges listed in the law itself, though, and it is still a handgun of whatever class it's barrel length dictates.
It'll take you less energy to read the regs yourself, and not come off as an ass, than it will to continue to spread incorrect information.
Law Enforcement? Meter Maid? Dog Catcher? Just asking, because if you are a Police Officer, and you are as stubbornly convinced of your being right, I'd really hate to be the poor bugger you unload your 'knowledge' onto while he was having a safe, fun, and Legal time with his antique handgun somewhere you didn't approve of, and particularly, if that one was chambered in a modern round.
Really. Read up on it. It's not a debate. The Law itself is available to be read.
Cheers
Trev