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Author Topic: U87Ai: What Serial Number Change From U87?  (Read 3839 times)


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U87Ai: What Serial Number Change From U87?
« on: May 05, 2011, 09:29:59 PM »

I've searched for this on the "interwebs" but haven't been able to pinpoint the info I'm looking for:

What was the serial number that transitioned the U87 to the U87ai in 1986?
Thanks for the info Klaus. You rock!



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Re: U87ai Serial Transition Number?
« Reply #1 on: May 05, 2011, 10:32:31 PM »

All A's in my serial-number collection date from after 50,000, all previous U87 non-A's stopped short of 50,000. Assume therefore that 50,000 was the serial number of transition between U87 and U87A.

Klaus Heyne
German Masterworks®
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