Royal Crown Cola (RC Cola) 2-sided can opener & Slide calendar - Very Unique!!!

Description

This is a very unique advertising piece I haven't seen anywhere else. The opener has two different ends, and you can slide the main wood bar to adjust the calendar. I'm not sure what decade this piece is from, but probably late 1960s.
This opener belonged to my grandparents and was kept in a drawer rather than used. I don't see any scratches or marks.
I don't see any rust anywhere on the metal. However, please view all photos, as they are part of the item description.
Questions welcome. If you would like a photo from a different angle, just ask.
Payment due within 24 hours of auction end. Item will ship next business day. I don't ship weekends or holidays, as the mail in my small town isn't picked up on those days.