Lewis Gun mag, ex Nepalese?

[Warren]

Markings are consistent with all other British ,303 Lewis mags I have owned and have seen.
Colour I don't think can peg them to any country or particular usage.
Most original mags have the white half circle so they could be correctly oriented when loading the gun, as James (MKVII) has stated.
A blued mag with the white half circle is a nice one to have and if you have the gauges and tools the mag should last a lifetime unless dropped on a hard surface when loaded.
The main tools to have with a Lewis and the mags is a mag roundness gauge and the tool for adjusting the pins and the rims.
If anyone is interested, I'll post a picture of them