Identificación of this Hunt Baby Cup #1

Hi, I recently acquired a Sterling baby cup. I have identified the hallmarks as Hunt but there are some very unusual points of interest. The cup has the #1 on the bottom (im guessing that is the pattern #) and it does not have the usual golden inner lining. In fact you can see the weld marks from where the handle was attached from both inside and outside the cup. Also, the bottom of the cup has a hammered lining. Almost as if this were a draft or maybe am apprentice piece. Is there any thing you can tell me about it? Thank you so much.