<I see now how 175 and 176 produces your ancient metre but it does not produce the equatorial circumference. Both calculations work inside Michell's canon so i don't see how my calcs are affected. Your definition gives the speed of light and my calc gives the French modern metre which fits exactly into the canon using 39.37 and 39.60.>
I'm glad you are starting to see some of the applications for the Old Meter value of 39.375 ins. Allow me to give you a more physical proof of it's known existence in Old Kingdom Egypt. The pyramid of Niuserre in this case, has a perimeter of exactly 315 Old Meters, equivalent to 600 AE Royal Cubits of the maximum length of .525 OM's or 20.671875 ins. per cubit. The Wiki articles describes it having a side perimeter of 78.8 modern Meter's, which is undoubtedly a rounded figure intended to represent 78.75 Old Meters per side. Since this was the maximum length of the AE Cubit outside of any extraneous extensions used for other purposes, this dilapidated pile of stones couldn't be of any greater dimension than stated. The figure 7875 should be well known by now around here, eh Jim? :)
<Nyuserre built a pyramid for himself at Abusir named Mensut Nyuserre,[note 16] meaning "Established are the places of Nyuserre" or "The places of Nyuserre endure".
The completed pyramid was entirely covered in fine limestone. It was about 52 m (171 ft) tall, with a base of 78.8 m (259 ft) along each side, a slope of 52 degrees and a total volume of stone of about 112,000 m3 (4,000,000 cu ft).>
Here is another application you might have missed in one of my previous posts, to it's Wheat grain density equivalent value of 196.875 gr/wt. per cu/in., that also expresses a numerical equivalent to the half meter of 19.6875 ins x 2 = 39.375 ins. And also this figure's arc to chord ratio of the AE RC of 20.625 ins. x 21/22 = 19.6875 ins., as I am sure Jacob will attest. I'm sure I can come up with a few more examples in case you have any more doubts.