Was there a Billon in Russia!?

The standard silver sample is 396 °, however, of the more than 10 examinations that I came across, they did not show Billon they showed a silver sample of ~ 750, here is one of them:

I also looked at many other coins with a standard silver sample of 396 °, but Billon was also not shown, everywhere the silver sample was from 710 to 970, here are some links:

https://numexpert.ru/wp-content/uploads/2019/05/1720557430.pdf

https://numexpert.ru/wp-content/uploads/2020/10/1720558002.pdf 

https://numexpert.ru/wp-content/uploads/2018/10/1720557332.pdf 

Bitkin 1253-1301. Some of those numbers indicate state sponsored counterfeits.

If I am reading your papers correctly, they are telling that density tests indicate .396 fine silver and surface tests show .700-.750 fineness. They are telling that coin is not the same inside as on surface.

38 zolotnik/dolya fineness is .396.

Period kopek had silver value that is in tenths of the gram. For Peter to release functional money instead of silver foils, he had to increase coin weight by adding copper.

A coin with a silver content of 750 cannot be called a bilan, since silver coins with a sample of 500 and below are called a billion. https://ru.ruwiki.ru/wiki/%D0%91%D0%B8%D0%BB%D0%BB%D0%BE%D0%BD%D0%BD%D1%8B%D0%B5_%D0%BC%D0%BE%D0%BD%D0%B5%D1%82%D1%8B
Billon is an alloy with a low content of precious metal, in a narrow sense, an alloy of copper and silver, where the latter is less than 50%.

That kopeck is not at .750 overall fineness. Your report told that it is ~.750 fine only on surface. Looks like they could not produce consistent alloy. Copper is less dense than silver and .750 coin would weight more in density/volume tests. Billon applies to overall silver content in piece, not to fineness of silver coating.

Compare silver content in Peter's kopecks.

1 kopeck = 0.24 grams of pure silver (1713, .396 fineness)

Altin / 3 kopecks - 0.64 grams (1704, .802 fineness) or 0.68 grams (1713, .396 fineness)

Grivenik / 10 kopecks - 2.04 grams (1718, .728 fineness)

1 ruble - 20.7 grams of pure silver (1719, .728 fineness).

I won't be rechecking when he devalued his first ruble during period significant emotional event.

If “1 kopeck” weighting 0.6 grams was .750 fine overall, it would be worth 2 or 3 period kopecks. Peter would  shave all the beards on such wasteful mintmasters and hang them to dry on his ships.