In the past i use to pick old bottles out of a slew near Luthern Hospital. I did get a few blob top bottles there. Just ask I'll tell ya how to get there.
Assorted, Mostly pre 1900, some intact, Had a cherokee bottling works blob top. they use to dump local trash over the edge. On a clear sunny day I'd walk in the water with a 5 Gal bucket and just pick them up. There are alot more in there i never tried to clean them out. I know I've seen busted old wiskey bottles with old Pat. dates on them.