Vintage Shop/Pub Brass and Enamel Letter O

Vintage Shop/Pub Letter O taken from an old shop sign from the 1930's or so I was told
Made from brass with a off white enamel front and a green mottled enamelled back
There are four threaded areas on the back of the letter which attached it to the sign
This is a very old vintage letter and it has a section of around 4cm where the white enamel has cracked and some tiny bits have fallen out, there is also some light surface to the letter in other areas too but its not very noticeable
The size is roughly 25cm width x 25cm height x 1cm depth
Please check my other auctions for other similar letters