Yooper John;
The trigger group is also the early type.
Yes, in Canada, SKS's are imported with bayonets attached. No need to remove them, as they are perfectly legal.
No offence taken, but telling a guy that his "bayonet must be floppy" will always provoke a bit of ire.

With an "OP8" serial number, a transitional bayonet lug and handle adaptor, and an early trigger assembly, there is support for a very early 1953 Izhevsk.
BTW your webpage is phenomenal. It provides SKS collector newbies (and experienced collectors) with excellent baseline information. I have referenced it on many occasions.
(ps., I believe silver matte finished bayonets are original equipment on non-refurbished mid to late-1954 to 1956 Tulas, and on 1953-1954 Izzys. I own an as-issued example with a silver matte finish bayonet, but I digress)
As promised, here are better photos of the bayonet lug and handle adaptor:
Again, the lug and adaptor share both early and late SKS features, making them transitional in nature, and rare:
1. straight cut inner ears on bayonet lug =
early (commonly found on pre-1952 Tulas)
2. recesses on bayonet lug =
late (commonly found on post-1952 Tulas)
3. straight cut bayonet handle adaptor =
early (commonly found on pre-1952 Tulas)
4. lower bayonet handle lip ground down =
late (commonly found on post-1952 Tulas)