Mystery maker solved - see below. Resembling some Macefield free form Jewelry, hand wrought by a contemporary of same, who worked not far from Macefield maker's William Mason and Leonard Field, in North Shore Saugus, MA.
41 grams of sterling silver! This completely bench made free form necklace stamped: Sterling A. C. K. -see image 2, is by a now deceased Boston area jewelry artist and book illustrator. Info included with order.
Weighs 1.4 oz or 41 grams. Pendant is just under 1.5" across an approx 17.5" around. In unused vintage condition.
$11 USPS Priority/Ins/Track or Free with your USA Ck or USPS MO.
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Mystery mark solved. After years and years of futile research, this jewelry artist is still unknown to most. There is a $30 gift certificate/store credit here at www.mimideeartwear.com to be awarded soon - see below. See image 2. Some say it is Anstrice Carter Kellogg. Substantiating online web pages must be made available to validate the maker. Contest for lower 48 states.
UPDATE: 9/2/15 A call came in from NH from a gentleman who as a youth was her lawn boy and fondly remembers Mrs. Kellogg to have been a prolific artist, jewelry maker, painter, head of the arts department at Saugus High and member of the Lexington Arts & Crafts back in the 70's or so. A blog will be written from the quick notes taken during his most interesting 2 hour call!