Sid Marks fight record?

[DavidEpstein]

Sid Marks is listed in boxrec with 7 wins. In a 2-page write-up in Ring Magazine December 1966, Marks is credited with an 18-straight knockout streak. And at 43, credited with fighting 35 opponents in 35 bouts each scheduled for 1-round each in a single evening. Perplexing?