Probably an impossible question to answer, but it would be intriguing to know how many are still on this forum...
I have spent quite some time on the H-D VIN checker, along with a check digit generator, and I believe I have all the 408 VIN's confirmed by H-D. I also have quite a collection of links to ads from approx the last 10 years with different Brandywine SERK's, some of which I have the VIN and others that I do not have any VIN. So some of the ads could be of the same bike, but I fell pretty certain that I have at least 50 unique bikes covered. I also have at least 4 VIN's of salvaged bikes but there are probably more.
Of the 408 bikes there are 38 destined for California (identified by a "3" as the 8th digit) and none were so called HDI bikes (should have had a "5" as the first digit). So maybe H-D didn't use the HDI designation that early? The parts catalog definitely mention international models, and lists kmh speedometers. As a side note there were two purple SERK's sold brand new in Norway in 2002, so some sort of international models were definitely available.
However, is it acceptable to publish the list of VINs that I have? It would give some indication of what number in the sequence a specific bike would be, although there is no garantee they actually left the factory in that order.
My bike has number 1HD1PDC342Y950068 (no secret here, as this is public information here in Norway) and according to my list it is Brandywine SERK number 26 in total, and number 2 ! delivered to California. It has a production date of june 25th 2001 according to a label inside the left saddle bag, and was sold new by Orange County Harley-Davidson in Irvine California.
Anyone else want to share their Brandywine SERK?