The following frame was offered at ebay.co.uk in Sept 2006. It was re-offered in January 2007. The seller made the following claim:
"This frameset was purchased by me new, several years ago. ... I am advised this is an early Yorkshire (Jackson) built frame, the serial number on the bottom bracket is 6186, suggesting 1986 as the year of manufacture."
Jackson frame numbers did not follow this format; from 1986, Jackson-numbered frames bore numbers starting 86xxx, five-digits, year first, production sequence last. Moreover, Jackson didn't make 61 Hetchins frames in 1986 (they'd have turned hand-springs if they had!). Neither does 6186 fit into the pattern for a 1960s frame (i.e., 1961, 86th frame) because that system started in 1962 not 1961. Moreover, 1962 frames started with 2, not 62. 1961 frames bore five-digit numbers starting with H2, not 61. 6186 might suggest a 1966 year of production, but 186 frames for that year is not likely; Alf would have been turning handsprings to have sold that many in that period. In short, this is not a valid serial number for any period; not a valid Hetchins frame number anyway.
David Miller saw the ebay offering and had the following to say about it: "Here's a conundrum of a frame for sale! I'm positive Jackson's didn't build it and it certainly isn't a Bonum. Yet the owner says he bought it new, several years ago! So he should have the paperwork confirming where it came from. Highly suspicious. Regards, David [Miller]"
Below are fotos of the frame as offered, with commentary by the Editor.
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