# 1 C S R Unit, Canadian Army
I am attaching a scan of a cover addressed to an officer with the above unit. The franking is FPO SC3, HQ Canadian Reinforcement Units, Aldershot.
I am endeavouring to understand what the initials stand for. I imagine the C is for Canadian and the R is for Reinforcement, but cannot find anything to confirm what the S stands for except a reference to the Canadian Signals Reinforcement Unit. Does this make sense?

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Here is a scan of the reverse, indicating it was sent from #3 Wing, Canadian Training School on the 25th Feb 1943. What were they training and where were they based
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I hope the party on the 6th March went well