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    Japanese version of the Bygrave/MHR1 on eBay
    From: Art Leung
    Date: 2022 Jun 1, 06:21 -0700

    There is a Japanese version of the Bygrave/MHR1 position line slide rule up for auction on eBay with a seller in Sandy Eggo, CA, USA.

    RARE Japanese Navy WWII Bygrave MKII navigation slide rule only 3 in existance | eBay

    I'm not affiliated with the seller at all and the price is well above what I can afford, but thought I'd share in case there is interest.  There aren't very many among us who know how to use one and I hope that it finds a home where it's history would be appreciated.

       
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