Nice find! I still have my dad's Post slide rule AND the leather belt holster AND the hard cover? instruction book. I used it with a $45 four function calculator in my undergrad physics class in the early 70's.
KE4NBB Ted
On Thu, Aug 11, 2022 at 6:27, David Wilcox K8WPE via groups.io<Djwilcox01@...> wrote: What kind of battery does it use, and where do you put it in? I hope they took the battery out years ago or it will be all corroded. Ha!? Wish I had kept mine but being a poor student needed cash all the time and sold whatever I wouldn¡¯t need in the future.
Dave K8WPE
David J. Wilcox¡¯s iPad
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On Aug 10, 2022, at 5:55 PM, Martin Glazer <mglazer2014@...> wrote:
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