Found coin

I found a coin whilst gardening along with other coins (Ireland 1penny etc) but I found a “the tails saggers club pendent) 
please give me more information on it

Number on back 

87920

Hello and welcome to Numista! 

What kind of information are you looking for that isn't on the medal page?

Not too sure, I don’t know much about it, 

I read that 200,000 dogs were given it after joining the club and it raised £20,000 but any information about who it belonged to or whats best to do with it? 

Maybe contact this organization. They may appreciate getting one of the original medals back.

https://thetailwaggersfoundation.org/about/

Thank you! 
Enjoy your evening