If I had to guess I'd say the ring is possibly from the WWI time period and this type of dark green turquoise looks to me like green Cerrillos turquoise.  Green Cerrillos turquoise comes from the Cerrillos Hills Mining District, located in north-central New Mexico, USA. This prehistoric mining area sits in Santa Fe County, approximately 10 to 20 miles southwest of Santa Fe and north of Albuquerque.  The stamped silver work is indicative of the Navajo Indians.   

It's definitely a cool patch and very well done.  I can't see someone going to this much trouble to hump up a patch that can be easily verified.  It must mean something to someone.  

I made some 1" OD7 Mil-W-530 cotton webbing replacement straps, with the crushed brass ball tips last month for another member.

@268th C.A. Just asking but why should i use blocks of wood? does the metal from casings affect the fabric on the belt?

Thats what I was going for!

M2A2 Aiming Circle has a different elbow/prism optic site vs the "half binocular" construction of the M2. Attachement to the tripod is also different, without that gimbal you see on the bottom of the M2.     M2A2 is what was used to lay in the Company level 81mm and 4.2in/107mm replaced by M120 120mm Battalion level mortars when I got out in 1996

Good luck at the Militaria sale.  Of course those are always fun to go to.  I pray that you'll have a positive outcome with your back surgery and that you'll have a rapid recovery post-op.  Take care and God Bless!  -- Matt

Embarrassing typo ( I meant long shot)  not sure why it corrected to that.

Does anyone have any good ways to repair it or should I just get a modern one to use ?