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.