RB66-1 brass finish
for use with any 6-16 volt chine transformer
flush mount with 5/8" clearance hole
size 2" x 4"
New old stock in very worn package. Some of plastic covering is separated from cardboard backing, both screws are loose but still in package - will be in a plastic bag so it won't get lost if one falls out. There are marks on the plastic cover, they are not on the actual doorbell (tried to show that in photos as best I could).
Thanks for stopping by!