New coins to identify

Hey guys, and thanks for your continuing help.

I have come across some coins that I haven't been able to identify yet, so I was hoping for some help. Some of them I posted here before, but now I have cleaned them (left them in olive oil) so their marks seem more visible and therefore possible more likely to be identified.

Any help is very much appreciated.

1.Chinese cash coin, 23.5mm, 3.6g.



2. Indian?, 10.96g, 18.3mm



3. Roman (possibly Sarmatia devicta like the one here), 19mm, 3.13g



4. Indian?, 18.9x15.6mm, 10.3g



5. indian?, 11.1g, 18.4x16.4mm



6. token?, 27.6mm, 7.05g



7. indian?, 8.5g, ~19mm



8. indian? 10.9g, 14x17.9mm

Hello,
Try to post one coin per post next time : it's easier to figure out what haven't been identify yet

1) Cash minted in the old branch of the Board of Works (Boo Yuwan) under Daoguang : https://en.numista.com/catalogue/pieces12421.html (DH#22.594 )

3) "SARMATIA DEVICTA" reverse type, indeed, and Constantinus I too ("CONSTAN TINVS AVG"), first officina of Trier.
Reference : RIC VII# 435 : https://en.numista.com/catalogue/pieces57324.html

6) Medieval token, indeed.

Thanks, Cycnos! Much appreciated.

Neither of these has been identified yet, either by me or by any member of this community. Thank you again!