Westland Dragonfly WG751 from 1952.
First on-site sketch for quite a while (months, possibly more than a year). It started to rain when doing the line work so I had to quickly snap a photo and continue indoors.
It was drawn and painted with brown, and then I “aged” it a bit to make it look more in keeping with the age. I think I went a bit overboard with the vignette but that’s OK… it’s only for sketching purposes anyway.