Stoneware studio cider flagon

Stoneware studio cider flagon
13”
Hand applied bird on front.
No mark unfortunately
Looks 60s or 70s perhaps

And the base

I thought I’d send better photos after cleaning off the paint and mud etc. The grey brown glaze looks similar to Leach standard ware glaze from 50s or 60s but I guess that must have been common at the time. The detailing on the bird world have taken some doing - it’s not just an applied sprigged design. Any ideas? Could it even be something foreign?