It's German, clearly, but you need to provide its denomination. Please post a new question with that info as well as the mint mark (A = Berlin).
1 zinc pfennig $2 to $5
5 zinc pfennig $3 to $6
10 zinc pfennig $5 to $15
1 copper pfennig $4 to $8
2 copper pfennig $5 to $15
50 aluminum pfennig $15 to $35
5 & 10 brass pfennig $25
2 & 5 silver reichsmark $5 to $10 above spot
About $240 USD
Gold bullion is based on the going market for the metal and is usually purchased in bars with a troy ounce weight of about 400. The 1893 Deutsches Reich 20-mark coin weighs only about 8 grams, so it would not have the same value as a bullion brick, but a coin in good shape can be worth over $200.
Yes there is 50 mark coin from 1878 with Wilhelm the 2th Deutsche Kaiser Konig V.Preussen on it .
A denomination is needed.
This German coin is fairly valuable depending on circulation condition. It can range in value from 20 dollars to 400 dollars.
W is not a mint mark; it's the monogram of the coin's designer A. A. Weinman. Please see the Related Question for more details.
It's worth about $2.00 just for the silver maybe more, but it depends on the grade of the coin.
A 1889 Deutsches Reich 20 Mark gold coin is 90% pure (10% copper). It should weigh 7,9649 g, giving it a gold content of 7,1685 g.
1943 steel cents with no mint mark were minted in Philadelphia, Pennsylvania USA. The value of this coin varies depending on condition. As of June 21, 2009 eBay sales show them ranging from about 3 cents each to about a dollar.
You are asking about a One Mark coin from the German Empire (KM#7). It is about the size of a US quarter, weighs 5.5 grams, and is 90% silver, giving it an ASW (Actual Silver Weight) of 0.1606 troy ounces. 6,155,000 such coins were produced at the Stuttgart mint (mintmark "F") in 1874, making amonst the most common of the "Deutsches Reich" (German for "German Empire") 1 Mark coins. With silver at a value of US$39.65 per troy ounce (as of April 7, 2011), the coin's "melt value" is US$6.37, higher than the numismatic value of the coin in "worn" condition. According to the Standard Catalog of World Coins, an example would be worth US$2.50 in Fine condition, US$8.00 in Very Fine condition, US$40.00 in Extremely Fine condition, and US$125.00 in Uncirculated condition.
2.2 mil on average
It is necessary to know the amount of wear and mint mark (if it has one) to be able to make an estimate of value. I would suggest you take your coin to a reliable dealer and have it appraised.