help. i need somebody. help.

ok. so this is a specialpost. i need your advise. when i've been browsing my local charityshop i've found this skillet. now if it were a ordinary skillet there whouldn't be a ploblem. but this one has got me puzzled. i have no idea what it is and i'm curious. it looks like this:

but it has a lid that folds over the top. the pan in the picture i a doughnutpan (i got one so i am going to make danish aepleskiver sometimes soon) but the other one.. is that also a doughnut pan? or something else? got any ideas? (also- should i buy it?)