The Weimar Republic (Germany between the World Wars) issued 50 rentenpfennig and 50 reichspfennig coins in aluminum bronze. These carry decent collector value if genuine and undamaged. Like all valuable coins, you must be aware that counterfeits may exist. There are 5 and 10 rentenpfennig and reichspfennig coins that look the same, but they are not worth much. Some of the coins with a 50 denomination are quite valuable, as discussed next.
The reichspfennig issues are more valuable. Both look the same except one inscription says 'rentenpfennig' and the other 'reichspfennig.'
worn: $7 US dollars approximate catalog value
average circulated: $18
well preserved: $30
fully uncirculated: $150
These approximate values apply to all dates and mint marks except the 19223J, which is much more valuable. A 1923J catalogs for $800 in average circulated condition, and the value triples for uncirculated condition.
All of the reichspfennigs are like the 1923J rentenpfennig. They are all worth $1000s of US dollars regardless of date and mint mark. Hope you have one of those!
worn: $800 US dollars approximate catalog value
average circulated: $1400
well preserved: $3000
fully uncirculated: $5000
Obviously, if you have a genuine 50 reichspfenning it is a special coin and must be treated as such. There are certain dates and mint marks which are worth even more than the values shown.
The prices quoted here are inflated catalog values. Use our Important Terminology page to understand what 'catalog value' means.