Vintage 1960s IBM Hexadecimal Adder 229-3168 Field Engineering w/ Stylus S/360.
Description:Authentic 1960sIBM Field Engineering Division Hexadecimal Adder(IBM Part No.[phone removed by ]), complete with its original knurled metal stylus, fully tested, and coming directly from the personal collection of a noted IBM software engineering pioneer.Issued to IBM Field Engineers (FEs) and systems programmers during the landmarkIBM System/360 mainframe era, this 4-digit mechanical Base-16 (0–9, A–F) rotary dial calculator was used to calculate hexadecimal memory addresses, entry points, and offsets when reading core dumps and debugging OS/360 software failures. Manufactured for IBM by Sterling Plastics Co. in the USA.Notable IBM Provenance:This unit comes from the personal collection of my father,E. Jay Fischer, who spent his career at IBM. During the 1970s and 1980s, he worked closely alongside IBM’sAllan J. Albrechtduring the pioneering development ofFunction Point Analysis (FPA)—the groundbreaking IBM methodology that replaced "Lines of Code" for measuring enterprise software size, productivity, and capacity. He went on to staffIBM’s Function Point Center of Competency, co-authored multiple editions of the globalIFPUG Function Point Counting Practices Manual, and was named an IFPUG Honorary Fellow in 2021.Details & Specifications:
- Brand / Division:IBM Field Engineering Division
- Part Number:[phone removed by ]
- Reverse Markings:MADE IN U.S.A. / U.S. PAT. NO. 2,797,047 / CANADIAN PAT. NO. 556,754 / BRITISH PAT. NO. 773,099
- Dimensions:Approximately 23.5 cm x 7.3 cm (9.25" x 2.875").
- Accessories:Includes original knurled metal stylus (docks snugly in the side slot).
Condition (Tested & Working):Fully tested and working—all four rotary dials turn smoothly with the stylus, and the internal carry mechanism properly advances across digits during hexadecimal addition (9 + 8 = 11hex) and subtraction back to0000. Very good vintage cosmetic condition with warm, even age-toning to the cream plastic body. No cracks, chips, or personal engravings/etched names on the front or back. All black and red recessed lettering remains crisp and fully legible. Please examine all high-resolution close-up photographs for exact details.The exact item and stylus pictured will be carefully wrapped and packed in a sturdy box for shipping.
