Bow & Bridge Violin and bow makers, as the old books printed them

Rettberg

Boston

Historical maker

Named in 1 book.

What the books printed

Critical and Documentary Dictionary of Violin Makers Old and Modern, Poidras, Henri. Rouen: Imprimerie de la Vicomté, 1928. Page 202, scan 286. Held as more than one scan.
RETTBERG (Raoul) — Boston (2, Park Square). Contemporary bow maker.

Same name

Whether any of these is the same person, the books do not say.