Russia, Y#22a.1, 20 kopeks, date worn off, СПБ АГ

[Prosit]

I don't know if this is the right place to put this or not....may have been used for payment.
Another "what is it" question from my website:

Kellie writes: Hi,
I think this coin my be Austrian but I am having trouble verifying that. Can you help?
I have attached pictures as you should be able to see there is no date visible to help and no head either.
hope you can help.   regards Kellie


1.  I don't think it is a coin
2.  I don't think it is Austrian   

The reverse, under a crown, says 20 K(unreadable)
Looking at the shield on the two headed eagle my first guess was German state...
second guess...maybe Russian.

After all that I realize I am clueless 

Anyone care to hazard a guess?

Dale

[a3v1]

Dale,
Definitively a Russian coin, 20 Kopeks, period 1860-1917.
Regards,
a3v1

[Prosit]

I didn't know they made undated coins.....huummmmmm  I learn something every day.
Thanks
Dale

Dale,
Definitively a Russian coin, 20 Kopeks, period 1860-1917.
Regards,
a3v1

[Overlord]

The coin is dated, though the year is illegible due to wear on this one. I think this is Y#22a.1 СПБ АГ. The possible years are 1883-1893.