Can you help identifying this mark? Silver Bracelet

[Tammietired]

Hello! This bracelet is marked "STG" for "sterling" but the mark right before the "S" is hard to identify and I was wondering if anyone has seen this before! Any help is appreciated.
(admin photo edit - image too large - insert as link only - see Posting Requirements)
http://i40.tinypic.com/3008e41.jpg

.