OK So here's what I've got so far on harry Quinn serial numbers and dating -- can any of you fill in more data points? Please email me off list. I'll add it and post updates to the full list.
Q4206 Date: 9/26/1977 - from The Custom Bicycle
Q3921 Date: circa 1976 - my guesstimate based on other dates (owner's CR posting says 1972) - Owner John Siemsen
Q3306 Date: 1974 - based on email from owner - Owner: David Cooper
Q3284 Date: 1973 - based on email from Chuck Brooks - Owner: Dale Brown
Q3234 Date: circa 1973 - based on other dates (owner's CR posting says "shipped in 1974") - Owner John Jorgensen
Q3072 Date: 1972 - based on eBay seller's listing - Owner: David White
Q2689 Date: circa 1965 - my guesstimate based on other dates - Owner: Peter Kohler
Q2546 date: 1963 - based on email from owner - Owner: John Williamson
Tell me about your Harry Quinn!
Best,
David
David G. White
Burlington, VT