Antique writing slope locksmiths

I am acquiring a lovely large old writing slope that appears to be of very high quality, being made of flame mahogany I believe. There is a 3-latch lock inscribed with what appears to be a script letter "P" (picture attached). Any thoughts out there of who might be the manufacturer of the lock? The slope dates to roughly 1860's. Any help would be greatly appreciated!

 

photo of the object itself , please.
closed & opened

@Shangas
@Bev aka thelmasstuff

 

& as is our want to do............

where r u
where does the item come from
how did u arrive at the dating..

 

Try wont, Komo...

 

I like want , better !

cuz...y'know.... it's what we want !

 

Ah, yes...very good, sir!

 

all good......... keep me honest !

 

Unless they were SUPER luxurious and fancy and elaborate and cost an absolute fortune, most writing cases had very basic locks (I should know, I've picked enough of them!!). As a result, they used really generic locks.

The only company I know of which made high-end locks which were meant specifically for writing cases is Joseph Bramah & Co (yes, that Bramah), which operated out of the UK in the 1700s and 1800s. Although most of the times, they just made the lock mechanism and sold it to the case-maker, and they installed it in their boxes and stamped their name on the lock-plate. Or at least, that's been my observation.