Simple Technology STN-VERSA/4 - 4MB proprietary RAM expansion card for NEC Versa STN-series notebooks. Adds 4MB of system memory via the Versa’s dedicated memory expansion slot (this is not a PCMCIA card despite the form factor - it’s NEC’s proprietary memory module shape for the Versa line).

Compatibility note: the STN-VERSA/4 part number indicates this was sold for the NEC Versa STN models (passive-matrix display variants) rather than the active-matrix Versas. In practice the memory slot is electrically the same across many same-generation Versa models, so it commonly works in other PC-460-era Versas as well, but I’d recommend confirming compatibility against your specific Versa model before purchase.

Cosmetic condition as pictured - clean label, no visible damage. Pulled from a working 1994 NEC Versa machine, sold as-is.

For NEC Versa restoration, RAM upgrade, or as a parts donor. Memory upgrades for these proprietary slots are the hardest part of a Versa restore to find - once they’re gone, you’re stuck at base RAM.