Strange symbol in marital status column of census record
I'm looking at a 1940 census record which has something strange in the marital status column. For both members of the couple, "M" (for "married") is written in, but then crossed out, and a symbol which looks like a "7" is written next to it. It is clearly deliberate. This is on lines 36-37 on this page:
For various reasons, there is reason to believe that this couple was cohabiting but not married to each other (and both had previous spouses). Could it have something to do with that?