Ray,
et. al.:
Actually, by the time Elgin built the grade No. 571, they themselves were a bit confused about just what "8 Adjustments" meant. Some of their literature stated "
... eight adjustments - six to position and two to temperature" (see scan of Elgin's employee magazine June-July 1950
The Watch Word article, page 33 - below).
A year later, a June, 1951 ad (see below) noted "
... 8 adjustments, five to position."
After a few years, perhaps to clear up confusion as to whether it meant adjustment to heat, cold, isochronism and five positions; or temperature, isochronism and six positions; or perhaps as a marketing ploy to claim a greater number of adjustments; Elgin changed the No. 571's marking to "
9 Adjustments." This was understood to mean 6 adjustments to position. See the example below
https://mb.nawcc.org/attachment.php?attachmentid=79304&d=1293055503&thumb=1