Can anybody ID this button?

[creskol]

Thanks!

 

[Bramblefind]

What do you think the backmark reads?

I found this one first -

1847-1887

Sherlock & Co
15 King Street, Covent Garden

But the letters didn't match up quite right.

Then I found this -

Late 19th C

H E Block & Co

15 King Street, Covent Garden

 

[jimmy uk]

looks like a Livery button

 

[CRUSADER]

looks like a Livery button

 

[ivan salis]

I see on the rear --- scovell * gamd