Well, you can use the plastic straw to certainly get you to the obvious closest timing mark out of the 4 of them.

Yeah, I've seen multiple mfg's with multiple marks on balancer, kindof forcing you to use the old noggin. And some vans motor homes etc, can have indicators on bottom of engine causing problems in pass car application then.

Yeah I've only dealt w the std (1) slit pass car dampeners (BB) and some SB's w the partial ones/1 full one like Scratchn mentioned. Hope he posts a clear/close up pic of what we're dealing w & hopefully solve this

IMO,the one down below the timing tab is the 0* mark to use

the others are not as deep as you said

roll the lower/deeper cut line up to 0* and check for TDC

I will wager thats it

We got a clear pic! & that is a 1st for me (that many marks). W the one at the bottom being that far seperate plus the 3 bunched ones being "advanced" I'd say the chances are good. Stick the straw in there & lets find out. Turn it CW till the bottom mark is at O on the tab then stick the straw in then w your breaker bar/socket move the crank back & forth a bit on either side of the O & see if you're at the piston "dwell" point (can move the crank back/forth a bit from O & the straw does not move). If so put that mark at 10 BTDC (make sure your on #1 compression) then set the dist.