Vintage Sterling Silver Onyx Brass Mexico Rigid Collar Choker Necklace

This is a great statement piece at the same time being simple and stylish. Primarily made of solid sterling silver with 6 brass “wrap” accents, and a brass “x” accent on either side of the black Onyx center. It is 57 grams on my kitchen scale (too big to use the jeweller scale for precise weight) Hallmarked at the end as shown. About 5/8” wide at the middle 1/4” across the silver roped stretches and 3/8” across the brass accents Current relaxed inner circumference of about 14.5”. This is semi flexible so opens easily enough to get on and off and can be flexed wider for a bigger circumference. It is in very good preowned/vintage condition. Gentle signs of previous use but nothing detrimental or unsightly.