Short hunt with the MX Sport lands me an OLD GOLD ring!
The dime is a 62D ROSIE
The ring is an Ostby & Barton Jewelry Co. founded in 1879 and this is one of the older marks
They didn't use OB after the 20's
The founder Engelhart went down on the Titanic but his daughter was saved.
The MX Sport gets the Gold !!!!!
Happy Hunting !
PP