Please ID this button?

[collectorconor]

Hi,this was found in Ireland yesterday.As far as I know,it says something like P&S Fermin,Strand,London.I avent found this button anywhere on the net.It looks like it was gold plated.The picture on the button looks like a dragon or something,some animal with what looks like an arrow beside it.
Any help in identifying this button would be greatly appreciated :-)
Thanks.

 

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[HutSiteDigger]

I have that back-mark in a back-mark book that states : 1837

year: 1837: P & S Firmin-153 Strand London

 

[HutSiteDigger]

here

 

[CoilyGirl]

Happy St.Patricks Day,what a sweet coin!

 

[Iron Patch]

It's a Livery button. Many many different designs.