Is this little ramekin Crown Lynn?

I have picked this up so many times wondering if it belongs in the Four Digit Gallery.  The glaze matches the 1250/51 Corncob bowls, especially where the contrasting white breaks.  It 'feels' right, that is the weight feels right for the size.
I cannot find where it would fit into the scheme of things, but we are missing many shape descriptions in the Four Digit Gallery. There are no markings.
So I will put it here for now and hope that soon I can get back to do some more research at the Portage Museum and hopefully find this somewhere.

I'm guessing earthenware with that glaze, Ev, but you haven't specified.
(I think there are gaps in 1600s too.)

I'm with you on glaze. I suggest the corn cob stuff may have originally been honeyglaze and a later glaze, if that is what this is, would allow it to fit in the 1400s. I have not checked for number gaps in the 1200s.

Assuming a single casting but could that be a stick-on handle?
If so then 3000s and 5000s also possibilities: 5020 "margarine bowl"?

Yes this is Earthenware, but crikey I hadn't considered the other possibilities and will check them all out thanks Jeremy.