Posts: 2,309
Threads: 116
Joined: Jun 2005
I would be completely unsurprised if even HP didn't have that information for models introduced before 1997, with the possible exception of the 12C. If they do still have those records, they're unlikely to be willing to disclose the numbers. That's another kind of information about which "Those who know, don't say, and those who say, don't know."
Posts: 1,322
Threads: 115
Joined: Jul 2005
B;
That sort of information is considered top secret by the bean counters in every company, but it's a subject of conjecture by aficionados. That's why you will see first and last known serial numbers for some of the more important calculators published here and there on the net.
I have seen a guess of two million hp-41s sold plus another million's worth in parts, replacement calculators and misc like give aways and samples. I don't know where blanknuts fit in in all that. That number is believable for a calc with an 11 year run.
The amazing thing to me is how many are still in daily use. Some are also of educational value, such as the one(s?) at the air and space museum. The former county surveyor here in Contra Costa County Ca. has 4 or 5 of his on display under glass in the county engineering building along with some other "antique" surveying gear.
Posts: 764
Threads: 118
Joined: Aug 2007
My guess if HP says anything, it will be very vague. The HP 12C should be the number one seller.