Need help 3 Inch british mortar round

[TimG]

Sort of, there was an English pair who patented a phosphating process. The US rights were aquired by Parker, who further developed the process.

Tim

[TimG]

The white ring suggests that it is a 'method of functioning' ring, which in this case means bursting. This would suggest it is a 3" Smoke Bursting Bomb, White Phosphorous.

Tim

[BMG50]

I havent heard the term "parkerised" before. I take it this is named after the person that developed the process?

The Parkerising term or name is refered to the use of phosphating a weapon in the firearms industry, a dark or light grey porus finish that is very durible that absorbs an oil coating, used on a lot of US military weapons during and after WW2, even the Germans towards the end of the war started to use it. The same process is also used in the paint industry known a phosphating, so the top paint finish doesn't need to have a primer or undercoat as the paint soaks and key's into the porus phosphate surface. Notice that some paint finishes have no red oxide primer underneath. The WW2 American M1 helmet had this process applyed as with many other things.