Vintage Electronic Calculators:

Overview of Brands


CASTLE: 1438
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AKA (Label): UNIVERSAL CONVERSION, Product number (P/N): 1438,
Keywords/Tags: 1438
Date of intro: ~1975, Origin: Taiwan (List), Dimensions: 140x76x32mm,
Power: 6V: (AA x4) + Adaptor,
Display: Type = Display (VFD) (List), Digits = 8+1,
Number of keys: 20, #Key-Green: 7, #Key-Red: 1, #Key-White: 11, #Key-Yellow: 1,
Miscellaneous switch: [(ArrowRight)-ON LAND-NAUT IMP-US],
Classification: / Pocket / Converter,
Featuring: Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Original Equipment Manufacturer : QUALITRON: 1438, Resemblance with: PRINZTRONIC: Converter, (Resemblance 014), Made by: QUALITRON (List of all Import-OEM-models for CASTLE),
Collector value: 7/10,
Internet: Link-1: JOHN WOLFF's WEB MUSEUM


Created: 27-dec-2016, Manual-update: 27-dec-2020, Batch-update: 25-feb-2024             

# Pageloads since 2018: 18             

1 Pic(s),


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