A few idle remarks re: FN49’s:
Century Arms put together some FN49’s out of parts in the 1990’s. These will no doubt have all sorts of different markings on them. I believe these were all in 7.92. However, I wouldn’t think they would have made it to Canada.
Per Poyer’s “SAFN-49 Battle Rifle”, there is quite a difference in parts between the calibers. Here are just a few examples:
--------------------- 30-06: --- 7.92:
receiver width:------- 1.18” --- 1.27”
mag well opening:----- 3.4” ---- 3.26”
bolt carrier spring:-- 91 coils - 84 coils
triggerguard screws:-- 3 screws - 2 screws
The gas cylinder and plug are definitely different (personal experience).
The 7.92 does not have a firing pin stop (or safety), the other calibers do. I posted a photo of a firing pin stop at
www.ar15.com/forums/topic.html?id=72155 , second page.
Also per Poyer, the 30-06 and 7X57 have the serial number and FN markings on the right of the receiver, the 7.92 has them on the left. The 7.65 has no markings on the right and FN markings only, on the left.
Lastly, Sarco has used .30-06 FN49 barrels for sale.