There's nothing on the inside left, no fins or anything. I found it next to an old stone wall in an area that was once farmland in the 1700 and 1800's and not far from where I found the pieces of an old Geisel cook stove. I'm going to go back and do a more thorough search as soon as I can. Had a few warm days this week but now we're back to our typical New England weather, it's always tough digging no matter what time of the year it is and now the grounds starting to freeze back up again. But we'll see, I'll post if I find anything else good.....and since I mentioned it, anybody know anything about old cook stoves? I can't find a single pic of a A. Geisel wood stove, all I found was that Andrew Geisel started his business in St. Louis in 1852.....that's about it.