HP25 without or with polar coordinate bug more valuable ?


Hi folks,

maybe some of the collectors lurking on this list could give some opinions which HP25 is more valuable: the one with the polar coordinate bug (original manual with original addendum how to work around the bug) or the one which hasn't the bug.

Would need this advice on which of my two HP25 I might give away. I'm tempted to keep the one with the bug, because I think it's harder to get.

best regards,


They are not all that rare. Quite a bit more common than the HP35 with bugs, which is not all that rare either. What is rare is finding a person that knows how to find the bug...

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