"MACH: Sound Power Telephone;

MODEL: PHONTECH;

MAKER: ZHONGHANG SHIPBUILDING INDUSTRY CO.;

BOOK NO: TK40201-660-01;

DRAWING FOR INTERIOR COMM. SYSTEM" Wall type Sound Power Telephone,  12 LINES MODEL: BTS 4060  ZHONGHANG SHIPBUILDING.PHONTECH.99400-009-ML-01

"MACH: Sound Power Telephone;

MODEL: PHONTECH;

MAKER: ZHONGHANG SHIPBUILDING INDUSTRY CO.;

BOOK NO: TK40201-660-01;

DRAWING FOR INTERIOR COMM. SYSTEM" W/T CALL BOX, MODEL- 9016 ZHONGHANG SHIPBUILDING.PHONTECH.NA