[Keith Seymore]

I would encourage you to keeping going but it seems at this point we could do some (really) rough interpolation.

I counted 45 working days between the period of September 15 and November 15, 1969 (not counting any overtime; I arbitrarily chose the middle of the month).

122,000 - 102,000 = 20,000, divided by the 45 days = 444 units per day.

As a sense check, 55.5 jobs per hour for an 8 hour day. That's a pretty good value as most of the truck plants ran, and still do run, around 60 jobs per hour. I do not know if St Louis was running one or two shifts of production at that time.

Now, even though that rate doesn't seem to hold true for the period from December 15 to March 15, I would propose we can build up from the December value of 138,900 at a rate of 444 units per day.

145,100 - 138,900 = 13 days, which would likely put the build in the mid January 1970 timeframe, assuming (again) no overtime and that the plant did not run during the time between Christmas and the New Year holiday.

Looking at it another way, 145,100 is about 1/3 of the way between 138,900 and 157,000. I count roughly 66 working days between those two values, so we could figure your truck was built approximately 22 days after 138,900. Assuming 138,900 was built on December 15 (arbitrarily) then I count 22 working days up to January 26, 1970, again assuming no overtime and that the plant did not run between Christmas and New Year.


K