The design has been reproduced and reproduced in later years. You’ll find a lot of poorly done designs on newer lockets. This one looks consistent with art nouveau period as far as production of this piece. At first I thought it was unger but it’s not; few subtle differences to the make
So first:
Who is the maker of the design itself any idea?
Second: it came with a chain which is hallmarked with an irregular infinity symbol that looks more like a baseball bat and the letter B (possibly r)
Inside the locket and fob clip on the chain says “sterling”
Thanks in advance

