I think the CBSA guy is only giving you half the definition. There is a very important two letter word in the entire wording....OR
I copied and pasted this from the RCMP Website
Antique Firearms
This fact sheet is intended for individuals who wish to acquire an antique firearm. It presents information about how the Firearms Act applies to firearms that meet the definition of an antique, as set out in the Criminal Code and corresponding regulations.
The Definition of an Antique
The Criminal Code defines an antique firearm as:
Any firearm manufactured before 1898 that was not designed to discharge rim-fire or centre-fire ammunition, and that has not been re-designed to discharge such ammunition, or
Any firearm prescribed to be an antique firearm.
The following firearms are prescribed to be antique firearms under the Regulations Prescribing Antique Firearms:
Black Powder Reproductions:
of flintlock, wheel-lock or matchlock firearms, other than handguns, manufactured after 1897;
(Note that all other reproductions of long guns are considered non-restricted firearms. They don’t need to be registered but a licence to possess them is required. As an example, reproductions of percussion cap muzzle-loading firearms like American Civil War Enfield and Springfield rifles are considered non-restricted firearms and not antiques.)
Rifles:
manufactured before 1898 that can discharge only rim-fire cartridges, other than .22 Calibre Short, .22 Calibre Long or .22 Calibre Long Rifle cartridges;
manufactured before 1898 that can discharge centre-fire cartridges (whether with a smooth or rifled bore), have a bore diameter of 8.3 mm or greater, measured from land to land in the case of a rifled bore, with the exception of a repeating firearm fed by any type of cartridge magazine;
Shotguns:
manufactured before 1898 that can discharge only rim-fire cartridges, other than .22 Calibre Short, .22 Calibre Long or .22 Calibre Long Rifle cartridges;
manufactured before 1898 that can discharge centre-fire cartridges, other than 10, 12, 16, 20, 28, or 410 gauge cartridges;
Handguns:
manufactured before 1898 that can discharge only rim-fire cartridges, other than .22 Calibre Short, .22 Calibre Long or .22 Calibre Long Rifle cartridges;
manufactured before 1898 that can discharge centre-fire cartridges, other than a handgun designed or adapted to discharge .32 Short Colt, .32 Long Colt, .32 Smith and Wesson, .32 Smith and Wesson Long, .32‑20 Winchester, .38 Smith and Wesson; .38 Short Colt, .38 Long Colt, .38-40 Winchester, .44‑40 Winchester, or .45 Colt cartridges.
Now, maybe I missed this when I went to University, as I only took Arts and not law, but it seems to me that .41 LC is not one of the calibers mentioned, so does that not make the pistol in question a prescribed antique? If I'm wrong here, let me know.