The shop is
David Golber Violins
Studio 3A (3rd floor)
523 Medford Street
Boston MA 02129
This is in the Charlestown neighborhood, near
Sullivan Square, in a building charmingly called
the "Stove Factory" (which it was, long ago).
Phone there is 781-396-2323
I'm typically there 11 AM to 6 PM.
ALWAYS CALL FIRST.
To get to the shop by public transportation, take
the subway or bus to Sullivan Square, and then
it's a short walk.
Contact me ....