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HP 42S RPN Scientific Calculator Vintage — Used — Dark LCD — w/ Manual
Product Details
Description: Used HP 42S RPN Scientific Calculator in functional condition. The LCD screen is a bit dark, but the calculator is operational. Shows normal signs of age and previous use; please see photos for cosmetic condition. Features Reverse Polish Notation (RPN) logic, a two-line dot matrix display, and advanced functions including complex numbers, matrix operations, and integration. Includes: HP 42S Scientific Calculator Original Owner's Manual — Edition 7 A great vintage calculator for collectors, engineers, students, or RPN enthusiasts. Condition: Used and functional. LCD screen is somewhat dark. Please review all photos for the exact condition.
Daily Cleaning: Use a soft brush or damp cloth to gently wipe away dirt. Avoid harsh chemicals. For mesh areas, use diluted mild detergent and a soft brush.
Drying: Air dry in a cool, shaded place after cleaning. Avoid direct sunlight or high heat, which can cause fading and glue deterioration.
Storage: Stuff with paper to maintain shape when not in use. Store in a dry, ventilated area to prevent mold. Rotate between multiple pairs to extend lifespan.
Usage Notes: Designed for basketball. Not recommended for hiking, long-distance running, or other specialized sports where different performance features are required.













