It was an ordinary circulation coin in Germany up till the euro was adopted in 2002. At that time the exchange rate made it worth around 2.5 cents.
Not much, the coin you're describing is a 2 Mark coin, of which millions were in circulation. Unless it is in "mint uncirculated" condition, its value is purely as a curiosity, since the Deutsche Mark was replaced by the Euro.
There was the "Norddeutsche Bund" (North German Condederation) from 1867-1871 which was like a military alliance Then there was the "Deutsche Kaiserreich" (German Empire) from 1971-1918, after that the "Waimarer Republik" (Waimar Republic) from 1919-1933, the "Dritte Reich" or "Großdeutsche Reich" (Third Reich or Greater German Reich) from 1933-1945. From 1871-1945 the offical name has been "Deutsches Reich" (German Reich). In the time of occupation in Germany the "Bundesrepublik Deutschland" has been found in the areas occupied by Great Britain, France and the USA. Eastern Germany was under Soviet occupation and they chose to found their own state called "Deutsche Demokratische Republik" (German Democratic Republic). Nowadays as a united Germany we are still the "Bundesrepublik Deutschland" or simply "Deutschland".
This is an ordinary circulation coin that was used up till the introduction of the euro in 2002. At that time a mark was worth about 50¢ U.S. and there were 100 pfennigs in a mark, so the lowly little 1-pf coin was worth all of a half a cent.
Face value only.
A Mint State 1971 Kennedy has a retail value of $1.00-$2.00
Face value only.
100$
Kennedy Half dollars are very common, coins from 1971 to date contain no silver and are only face value.
A proof coin has a retail value of about $1.00
50 cents.
Next to nothing.
One dollar.