CMP wheel details

[david moore]

Thought that the Kelsey wheel experts would be interested in a detail I have just found on my Cab 12 F8 . Three of the wheels are marked Kelsey 1941 Canada as per my earlier posting in this thread.
The fourth wheel has a different marking - no year but the word WHEEL in the centre of the circle where the date year normally is - see (poor) picture attached. Also the stud welds are different - a manual weld circle instead of the parallel line (resistance?) weld.

I'm wondering if this is an early wheel- maybe the welding was not yet automated ....or late since it came as an almost unused spare. Maybe a post-war civvy after market version?

Cheers
David