Tektronix Type 543 Cathode-Ray Oscilloscope Instruction Manual M1-543

Original Tektronix Type 1A4 Plug-In Unit Instruction Manual 070-0545-00

Tektronix 1A1 Dual Trace Plug-in Unit Instruction Manual 1964

Original Tektronix Type 1A1 Plug-in Unit Manual for Type 545B Oscilloscope

Tektronix Type 1A1 Dual-Trace Plug-In Unit Instruction Manual 070-0885-00

Tektronix Type 1A7 Plug-In Unit Instruction Manual 070-0379-00

Tektronix Type 1A1 Plug-In Instruction Manual

Tektronix Type E Plug-In Unit Instruction Manual