Vintage IBM 30-Pin SIMM (Single In-line Memory Module) RAM

This is a vintage computer memory module, specifically a 30-pin Single In-line Memory Module (SIMM), likely dating from the late 1980s to the early 1990s. The unit features a narrow, rectangular green fiberglass printed circuit board (PCB) with four black surface-mount integrated circuit (IC) memory chips. A notable feature is the presence of an 'IBM' logo on a white decal affixed to the lowermost chip, indicating it was manufactured for or by IBM for use in their Personal System/2 (PS/2) or compatible computer lines. The module possesses a single row of tin or silver-plated contact pins along the right edge. The PCB shows copper tracing and markings characteristic of early high-density electronics. Condition-wise, the module appears to be in fair aesthetic condition with some surface oxidation visible on the contact pins and general wear on the labeling decal. The craftsmanship is typical of high-quality industrial electronics of the era, utilizing lead-solder and through-hole mounting techniques. Such modules were commonly used in 286, 386, and early 486 computer systems, marking a significant era in the evolution of personal computing hardware.

I have examined the provided image of a vintage 30-pin Single In-line Memory Module (SIMM). The module consists of a green PCB with four surface-mount ICs and an original IBM logo decal. Based on visual inspection, the item appears authentic to the mid-to-late 1980s era, specifically designed for IBM PS/2 or equivalent architectures. The physical condition is fair; however, there is noticeable oxidation on the tin-plated contact fingers, which may impede electrical connectivity without a chemical cleaning. The decal shows minor peeling and wear, typical for its age. The market for 30-pin SIMMs remains supported by the retro-computing community, particularly users of 286 and 386 systems. While individual modules are not rare, IBM-branded variants carry a small premium for collectors seeking brand-accurate restorations. Because these were commodity items, rarity is low. The primary value drivers are functional capacity and parity support, which are difficult to determine from current markings without a part number cross-reference. Limitations of this appraisal include the inability to verify functional integrity; without a POST test on a compatible motherboard, the electronic viability of the DRAM chips is unknown. Full authentication would require microscopic inspection of the soldering to rule out modern replicas—though unlikely for this value tier—and verification of the IC date codes. Provenance documentation showing the specific machine it was pulled from would bolster its appeal to 'purist' collectors. As it stands, the value assumes a non-tested, vintage-correct component for display or hobbyist repair.