Re: How to remove a 1949 Yale lockset
Look on the side of the shaft of the inside handle (the side with the pushbutton). There may be the edge of a tab in a slot, which when pressed in, allows the handle to be pulled off. Look around the edge of the rose (escutcheon) for a slot. If there is one, use a screwdriver in the slot to pry it off. Under the rose should be a pair of screws you can remove.
If it is how I think it is, once the body is removed from the door, the outer rose can be adjusted by screwing it in and out on its shaft to accommodate different door thicknesses.
If you can take pictures -- of the inside handle and of the outside handle -- and post them, that would be a great help.
I've seen some mortise-type locksets (not the kind that use a skeleton key) where you remove the plate from around the bolt on the edge of the door and there is a setscrew under that which, when removed, allows the handles to be removed.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.