Vintage Sterling Silver Taxco Mexico Swirled Collar Necklace

This sterling silver collar embodies all that is sensational about Taxco jewelry.  It features a sleek design with two swirls at the front.  The necklace is solid sterling silver and it is signed with the Taxco eagle 3, MEXICO 925 and three letters.  I cannot identify them but it might be lOS.  The back of the collar is open so it will fit most necks.

Condition:  In excellent condition with very minor expected light scratches.