Hi Erin -- Well that's a pretty cool coin. The double headed eagle on one side of your coin is often seen on Austrian and Russian pieces and, according to Wikipedia, has been used in artwork for millenia to represent the union of church and state -- exactly what the US Constitution forbids.
The 25 and 50 pennia Finnish coins have the same pattern and slightly different sizes, as follows:
25 pennia, 16 mm diameter, 0.031 troy ounces silver
50 pennia, 19 mm diameter, 0.062 troy ounces silver
Value-wise both coins are generally more valuable the older they get. Here is a typical progression of catalog values for most dates as time goes on:
25 and 50 PENNIA 1860s:
worn: $8 US dollars catalog value
average circulated: $20
well preserved: $60
fully uncirculated: $200
25 and 50 PENNIA 1870s through 1910:
worn: $4 US dollars catalog value
average circulated: $15
well preserved: $30
fully uncirculated: $100
25 and 50 PENNIA after 1910:
worn: $1 US dollars catalog value
average circulated: $2
well preserved: $4
fully uncirculated: $6
The values above are catalog values which are inflated over actual values. If you are buying or selling a coin you need to understand how catalog values work. Look at our Important Terminology page (link at upper left) for an explanation.
There are some *better dates* in this series. The values below are for coins in average circulated condition.
Finally, Erin, you report that your coin looks shiney or polished. If it has been cleaned with silver polish or some similar destructive procedure, it is worth nothing to coin collectors.
NEVER CLEAN A COIN. CLEANING RUINS VALUE.