Help wanted brick wall ancestor–Samuel Samson DAVIS, gunlock maker of London

[Jomot]

Michelle,

I think that Lily M has provided a real clue here. 

I agree.  I also found these, which may or may not be connected but worth looking into:

Bilston St Leonard's:
6 Apr 1782  DAVIES  Sampson son of John & Sarah

John & Sarah appear to have had several children, including Ann (1779):

http://blackcountryhistory.org/collections/getrecord/GB149_PRI_20_D1/

Also this:

Name: Mary Davis
Parish: Bilston    
Occupation to be acquired: GunLocksmith
Surname or Company Name: Durham
Other Details: Hen of West Bromwich until 21 yrs
Repository: Staffordshire Record Office
Reference: D667/2/1
Date Recorded: 14 Dec 1771

[Jomot]

Also just glanced through his will, and I notice he specifically asks for the sale of his business to be advertised not only in London but also in the Birmingham newspapers, possibly indicating a Midlands connection