Looks like a Wayne 515 to me. But I'm new to visibles myself. Don't have the book in front of me but don't think its a Boyle Dayton......GB
I questioned the tag installation.
Jim,
It looks like a Wayne 615,
Do you have pictures of the base and the drain back pipe and handle lock?
The gate valve is put on backwards and upside down plus it has the wrong handle.
Wayne purchased Boyle Dayton around 1928. It does not seem out of place to me that there is a Boyle Dayton tag on what appears to be a Wayne 515 with a 615 pump handle on it.
I just purchased a Wayne 615. It looks just like yours.
Never seen a WAYNE 515 with a Boyle Dayton tag. Those rivets aren’t original so someone put it on and the tags were never up near the cylinder casting. I think someone just put on a tag they had.