Antique Safe with Ruxtons Invincible Lock

[goldpro]

Hi all,

Here's a few pics of an old keyed safe I need to open.

The nameplate that slides over the keyhole says
"Ruxtons invincible lock" and the circular wording
says " wrought iron fire resisting safe"

It's a lever lock with at least 4 levers that I can see
with a scope.

Does anyone have any advise on how to open it?
I don't have any lever picks but I can make up something.
drill point? which way to turn to open? bolt works pics & measurements?
The customer doesn't want it drilled.

some google searching turned up English often with a coat of arms
above the lock but no useful opening info.

thanks for any info you can provide.
Tom