This claim is false. “We” know no such thing. Orly's claim doesn't have a chance of holding up in any legal proceeding (and has failed repeatedly in court to be considered as evidence) because it fails to meet the most rudimentary requirements under the rules of evidence. The 1890 claim is based on a stray notation of one computer printout as being “associated with” this number.
Only further discovery of Social Security records under court order can establish whether the 1890 date means anything of probative value.
The CT SSN was shown to have been issued in 1977 because the numbers of deceased individuals close to Barry's have been disclosed from that year. Given Barry's close association with identity thieves and forgers Ayers and his wife going back to 1980 I regard it as most probable that the Ayers technique of obtaining SS#s for dead babies was most likely used to link up Barry with this number in the early 1980’s.
That's the theory that I most lean toward also.