In 1982, Gittler emigrated to Israel, settled in Hebron, changed his name to Avraham Bar Rashi, and licensed the design to a local company in Kiryat Bialik called Astron Engineer Enterprises LTD.
During this period, he also made a portable, battery-powered amplifier, cylindrical in shape, with a long handle that allowed it to be rolled around like a grass-seed-roller.
He frequently used this set-up to play his guitar in a street adjoining Astor Place in lower Manhattan, where the reverberation from the surrounding buildings amplified the sound.
The New York version came without a pre-amp section; the individual pickups' signals were led into single cables, which could then be plugged into a mixing box or each separately amplified.
It is a signed minimalist instrument, identical to the one he played in the later period of his life and made to order for a client in Jerusalem.
After Bar Rashi's passing in 2003, his eldest son, Yonatan, became a partner in Gittler Instruments LLC.