Up for sale is a vintage memory expansion module manufactured by GSM U.S.A. This board is populated with Mitsubishi memory ICs and appears to be a proprietary memory daughterboard or RAM expansion module used in early 1990s computer, industrial, telecommunications, or embedded electronic equipment.
The board features three integrated circuits, including two Mitsubishi M5M44008BJ-7S memory chips and a GSM U.S.A. custom controller IC marked MPE41000J7. The PCB is dated 1993 and carries part number P/N 93135J. Gold-plated edge contacts provide connection to the host device.
Due to the specialized design and lack of compatible equipment, the module has not been tested and is being sold as-is. It may be of interest to vintage computer collectors, electronics hobbyists, repair technicians, or individuals restoring older electronic systems.
Features
GSM U.S.A. memory expansion module
Part Number: 93135J
GSM IC: MPE41000J7
Mitsubishi memory ICs: M5M44008BJ-7S
PCB date marking: ©93
Gold-plated edge connector contacts
Compact proprietary memory board design
Made in U.S.A.
Condition
Pre-owned vintage electronic component
Untested
No visible broken traces or major physical damage
Light dust and normal age-related wear present
Sold as shown in photographs
Included
1 × GSM U.S.A. MPE41000J7 Memory Module (P/N 93135J)
PRICE $10.00. REF A-58.