Thursday

VINTAGE WATCHING - 1970 Prototype Concept Calculator Watch by Litronix

This week's "Vintage Watching" presents an opportunity to own a one-of-a-kind chunk of electronic watch history. A 1970's concept calculator watch by Litronix.

Litronix, primarily an LED supplier to the other vintage digital watch brands including the first Hamilton-Pulsar digital watches. Featured here are these two experimental prototype calculator concept watches Litronix was considering for development.

But what makes this strange watch special is the unusual feature of sliders instead of buttons. Likely an attempt to improve the data entry from multiple miniature buttons to a more tactile sliding mechanism. The sliders move over a commutator which is a pc board segment. I assume you move them to the desired number and press down for selection but it sure seems like a waste of time. I guess that's why it never went into production, huh? Maybe someone can let me know if this slider function has ever been developed into another product from that time.

The second model shown here is just a block of metal, likely an earlier prototype of the one above.

The owner auctioning it (ends in less than a week), says he bought them a few decades ago a local watch and clock collectors' meeting. It is non-functional but nevertheless an interesting segment of calculator watch evolution.

Three battery compartments on back



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