RB 255 lists as a smooth lip and a missing 3rd L, so I think that's the logo used after 1896. Yours is ground lip with the pre-1896 logo. I think yours is closer to RB 253 but missing the apostrophe. You can always send a note to Doug LeybourneBALL(underscore) script dropped a MASONS(no apostrophe) PATENT 1858 ground lip shoulder seal 4 lines pt. aqua. Unlisted size and jar as far as i can tell. Closest listing is RB #255. Any thoughts?