by TIM WEBB » Mon Jul 11, 2016 8:45 pm
Roger, this is a really outside, long shot stab, but at work we use a 6 digit (used to be 5, with only one digit for the year) Julian calendar-based system to serial number our products. First 2 digits are the week (01 - 52), 3rd (now 3rd and 4th) digit(s) are the year, and the last two are the unit number that week (01 - ?). We can tell a 2016 unit from a 2006 unit from a 1996 unit, etc., but it sometimes caused confusion in the field, so we changed it about 5 years ago.
Anyhoo, I'm wondering if Marscot used such a numbering system, even if only for a short time? 42.0.5: week 42 of (probably) 1960, 5th hull that week? Hey, I said it was a long shot! <grin>
Perhaps John Alesch will chime in, as he's got a pretty good grasp of the early history of O'Day and associated companies, as do several others here. I think the biggest shock is that you have a DS of that vintage that still has the plate! ;-P
Tim Webb
1979 DS2 10099 The Red Witch
(I used to be Her "staff", in the way dogs have owners and cats have staff, but alas no longer ... <pout>)