Thomas William Lench
From Graces Guide
'Admiral' brand bolts and nuts of Excelsior Works, Blackheath, Birmingham. Telephone: Blackheath 1151. Telegraphic Address: "Lench, Blackheath, Staffs". (1937)
1897 Company founded.
1937 British Industries Fair Advert for 'Admiral' Brand Bolts and Nuts. Also makers of 'Admiral' Stainless Steel Castings. Rivets, Screws, Washers, etc. Black, Bright and Galvanized, in all metals for all trades. Telegraph and Telephone Ironwork. Railway Fastenings. Stainless Steel Castings. Malleable Iron Tube Fittings. (Engineering/Metals/Quarry, Roads and Mining/Transport - Stand No. D.621) 
1957 Private company.
1961 General engineers, manufacturing nuts and bolts. 1,500 employees.