Size 7 and adjusts smaller. Marked on back and clasp, see pics. A N A GF 925. This item was made bigger using the same material, Gold Filled Sterling Silver, its marked on clasp.
It matches the braclets material. The clasp and links were added. I did not do it, but can tell because this braclet was produced from 1940s-1960s and the clasp & jump rings have slightly more gold remaining, it's simply less worn, and the lobster clasp was not used much then.
They did a great job on matching it, and now will fit a size 7.