This is Stanley London.
Precison 4 inch level. Marked 1872 Stanley London.
Housed in a very attractive protective box.
Level has a rotating sleeve protector.
Brass mounting is marked in inches and CMs.
Very like the range of levels produced by Rabone.
Bubble appears yellow but is in fact clear, with a yellow backing paper
Intersting trade label on the box underside.
A very desirable level for the user or collector.