1726 Russia Rouble

Russia rouble- 1726 (per your identification)
KM 168
Silver .729
The weight should be around 28.4
It is a $300 coin in VG (full retail).
A pic of the reverse would be useful.

I don't come across a lot of these as Russian coins are not my area, but the obverse bust doesn't look quite right. By this I mean the bust. The reeding also doesn't look correct.
With a pic of the reverse, confirmation of weight (and did you test it with a magnet?)and perhaps a Russian coin specialist/collector from these forums you may get a confirmation about authenticity.

This coin may be real. There are a few known varieties of these. Still need a picture of the reverse. This coin is worth a fair amount despite the low grade. Reckon it may hit closer to the 500 dollar mark.

Ok this is a lot more interesting than I thought.

This coin is not a ruble coin but a poltina or known as 1/2 ruble.

Fear not, this is a lot more valuable than a ruble coin. I am leaning towards genuine and if it is, this is definitely more towards a 1000 dollar coin despite it's condition.

This is closest I could find.There is also some more varietes with misspelled obverse.Hard to tell from the picture.No suprise I couldnt find match in rubles