I'm not even sure this is a coin

I've searched the catalogue by image without finding anything useful. I'm not even sure this is a coin - it came in as part of a coin donation to Oxfam in Exeter, but then we get all sorts of non-coins in coin donations!!

Weight is 0.66 g approx.

Diameter 17 mm approx.

Could be a lighter version of this coin - or I´m completely off…

N#60386

 Or, strangely/coincidentally, similar to the topic just above yours … 

https://en.numista.com/forum/topic166492.html 

 as in a coin from Portuguese India. 

One side a shield within a shield, and a cross on the other side. 

Search - https://en.numista.com/catalogue/index.php?pays=inde_portugaise&ct=coin&p=1 

I've compared the first reply with the coin, and I just don't think they are simialr enough.

I've been through the Portuguese India coins as uggested in the second reply, but nothing seems a good fit.

Thanks for trying to help me :-)

The shape reminds me of a Vierzipfliger Pfennig

N#169639

Something more in this direction.

apuking

The shape reminds me of a Vierzipfliger Pfennig

N#169639

Something more in this direction.

I see what you mean. Thanks for trying to help me. I've checked through all for the Bishopric but none match really clealry. Also they seem to be silver and I don't think this is silver. I'm not good on composition but this does seem to have a coppery gleam in places.