$345.00 u.s.
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.
2.2 mil on average
About $240 USD
As of 07/2008, sammler.com, a major German coinage site, lists values as: > average condition - about $40 > moderately worn - $75 > uncirculated - $110
Yes there is 50 mark coin from 1878 with Wilhelm the 2th Deutsche Kaiser Konig V.Preussen on it .
15 to 50 dollars depending on its condition (Non-proof) ones.
About $50 retail if worn, up to around $150 if only moderate wear shows.The inscription (Deutsches Reich, btw) means "German Empire, Otto, King of Bavaria"
It depends on its mint mark and condition. Please see this link for more info.
Underneath the Eagle on the back of the coin one to the left and one on the right of the tail
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.
These coins were struck at a number of mints and values differ by mint mark. See the attached link for more info.