Canadian Clasp knives.

I thought I would post a few of my Canadian clasp knives.  They are common but are definitely getting harder to find.  
First off are the three silver sides.  
We have a OMF from WWI,  OMF earliest examples seem to be 1915 with no evidence of them made post 1918.   Thought to be a Canadian Company.  At this point it is an unknown maker and if anyone knows the manufacturer the information would help the collectors community a lot.
Next we have a US company Case XX.  Early version of the knife with aluminium sides instead of later stainless steel.  Manufactured 1936-45.

Next we have a 1946-1952 MS (Metal Stamping) a Case subsidiary made in Nova Scotia.

Lastly we have a British Pattern 6353 issued to Canada.  Unsure of when this was issued, could have been anytime between 1913 until 1941 (arguably it could have been issued post this but that was the manufacturing range.  I have many more clasps since they have become a nice fun collectable to find.