Vintage Data Transfer Switch 4 Channel Computer Parallel Serial Control

Vintage Radio Shack Parallel Port Data Switch Box Manual Selector DB25

Radio Shack 25 Pin Manual Parallel Shielded Serial Data Switch

Vintage 8-Bit ISA Serial Parallel Port Card MC6845P DB25 DB9 PC XT AT Untested

Vintage DB25 Parallel or Serial 2 Device Beige A/B Data Transfer Switch Box

NCR Clone of IBM 6135932 8 bit ISA BUS Serial Parallel Interface Card XT Era

4-port manual parallel data transfer switch (cross-over type) Retro Computing

Vintage Radio Shack Parallel Port Data Switch Box Manual Selector DB25