Can I get some help in identifying this coin please, thanks.

Weighs 3.2g & diameter 25mm approx.

 Your hexagonal item has 6 Kr which is 6 Kreuzer, and 

there is also a round shape 2 Kr as well. 

 Quote: 

GERMAN COINS AND MEDALS | Rhineland-Palatinate | Mainz, bridge stamps 

Casteler side Cu-6 Kreuzer n.d., hexagonal. Wheel on both sides between C. - S. above value. Prince Alexander - Collection Walther 787 Neumann 10063 Collection Heerdt 733 3.16 g.; 22 x 22 mm. 

Casteler side Cu-2 Kreuzer n.d., round. Wheel on both sides between C: - S: above value. Prince Alexander 888 Slg. Walther 789 Neumann 10055 Slg. Heerdt - 3.45 g.; 27 mm. 

 Near the end of the [German] page: 

https://peus-muenzen.auex.de/Auktion/KatalogArchiv?intAuktionsId=325&los=1139749 

Edit: ZacUK beat me by 2 minutes, haha

Someone with more expertise should check my work, but I believe it's not a coin, but a bridge token:

http://www.worldofcoins.eu/forum/index.php?topic=56625.0

Here's a auction where one identical to yours went for 180 euro:

https://peus-muenzen.auex.de/Los/65/936.0

Thank you ZacUK.  The realised price made me smile