Big ammo ????

Hi Guys
Not sure if this is right form? Found these big ammo shells.
that are 8 1/4 inchs long
1 5/8 inchs in dia.
marked on top
parachute cartridge white to green
on side marked
S.F.Co mudgersfo No36 (not sure hard to read)
Base marked
eley london
found these in gun shop i am cleaning out. not sure what they are an what to do with them. they were in 50cal ammo can nice an dry.

http://i91.photobucket.com/albums/k2...pse1b1bed6.jpg

http://i91.photobucket.com/albums/k2...psf48ff195.jpg

https://www.milsurps.com/images/impo...f48ff195-1.jpg
http://i91.photobucket.com/albums/k2...psccf51711.jpg

http://i91.photobucket.com/albums/k2...ps2d917a39.jpg

Just what they say they are. They project a parachute flare. Sell them for collector's ammo...

would they be for any branch of service? do they fit a big pistol or real big rifle?
thank you
mike

I'm wondering if it might be one of the type that was used by bombers for illuminating the targets. They would have a downward launching box of these barrels that were loaded with something like that. I know you have a screwdriver beside it and have published the measurements...but it's still hard to put in perspective...others will be along shortly...

thank you Jim for your input. yes they look like a jumbo shot shell. thought they might be of british service due to eley manufactor. also dont want to get my self in any trouble if i sell them. thanks mike

That is a 37/38 mm, is this what you are looking for ?................
37mm HR Flare Rifle - Google Search

That would make sense Tom. I wondered if it might fit a gun like our 38mm gas guns. Had it been shorter that would have been my guess.

that is what is throwning me off is the lenght og these cartridges. wouldnt mind seeing one in use either.