Right, the EIA date code was stamped on the chassis when it cleared the assembly area, no tubes, no front panel, no sub chassis. It could be months before a chassis became a fully tested unit and received its paper production serial number. In some cases,
years.?
Walt Cates, WD0GOF
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A majority of acceptance is not proof of correctness.
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I have collected serial numbers and build dates for Hallicrafters receivers such as SX-76, SX-88, SX-96, SX-100, SX-101, and SX-122.
My overall evaluation indicates that there doesn¡¯t appear to be any relationship between the rear chassis serial tag number (sometimes a stamped metal plate such as SX-88 or a printed paper tag) and the EIA manufacturing date. In many
cases it is often a confusing mess within a specific model type (for example SX-100) and the various versions (Mark 1, 1A, 2, 2A, 2B).