Ceramic Egg shaped studio piece, JJ mark

Hi all , I came across this strange piece of studio pottery , Approx 12 cm's tall and shaped like a cracked egg? , The inside is glazed with a turquoise blue colour  , The piece is stamped with 'JJ' makers mark on the base.

Any thought on the maker?

Regards

Carl

it looks like a hobby potter to me

Cheers Dan , it does have that look about it , the purposely done burnt area around the rim and the lovely blue glaze inside made me think twice , But I agree the outside decoration does have a hobby potter look.