Carrier fuel funnel ?

[sapper740]

Originally posted by G7s
Embossed on the funnel is the " big C with arrow " G.S.W. CANADA: it doesn't lend much help refueling my Blitz, because of it's verticle throat: but suits the carrier.

I wonder if this is for adding oil to a CMP's motor? F.Y.I. ....G.S.W. stands for General Steel Ware.