its not a C1, you can tell by the serial numbers. AFAIK, C1's were number,letter,numbers, EG 2L9260, which was my C1 sn, all the way up to the 8L series.
Its got a C1 body cover and rear sight, which are easy to replace with ausy/uk style full body cover, as well as the sliding peep aperture rear sight. Sling is Canadian as well, ausy slings were similar to the ww2 slings with the end hooks on the 2 ends of the sling.
Does it have any other info on the reciever? EG C.A.L for cdn arsenals ltd, or BSA etc.