Coin or medallion? Genuine??

This first one was at a shop so no dimensions or weight. It was in with a couple of Catholic coins?

I think it's aluminum or tin.

This next one was sold as silver and I believe it is 

This next one I am sure is an Indian state. It weighs 9.00 gr and is 18 x 19mm diameter. Thickness 3mm. Copper or bronze.

(The final one is brass. 15mm diameter. Coin identical on both sides.) 6.67 gr.

 Coin 1. An aluminium souvenir from the Jorvik Viking Centre in York, England. 

I know because I also got one in a coin lot, and a member identified it for me. 

 From thirteen years ago - https://en.numista.com/forum/topic18079.html 

https://en.numista.com/forum/topic18079.html#p138025 

https://en.numista.com/forum/topic18079.html#p489512 

N#110824 

· Information - https://www.jorvikvikingcentre.co.uk/ 

 Coin 2. Some of the lettering is  ERINNERUNG 1888  (do not need all of it) 

so putting just that in the Search 

https://en.numista.com/catalogue/index.php?r=ERINNERUNG+1888&st=147-150-149&cat=y&im1=&im2=&ru=&ie=&no=&v=&cu=&a=&dg=&i=&b=&m=&f=&t=&t2=&w=&mt=&u=&c=&wi=&sw= 

 gives three results, and yours is the second one - in a different metal. 

 Coin 3. 

 Similar - N#48138 

* * * * * *

 Coin 4. 

https://www.ebay.com/itm/205419335851 

Thank you very much. It would have taken me a lot of time and probably would never find out.