Trying to spot if the YMF Classic has a strobe on the belly that I can't see in this shot.
The new Waco Classic YMFs won't get by with just a belly strobe. They need to meet the current requirements for anti-collision light systems. I'm pretty sure they all have wing-tip strobe systems.
Original Wacos (i.e., those built by the factory in Troy OH in the 20s, 30s and 40s) would be able to get by with just one strobe (belly, fin tip, or wherever) as they only need to meet the anti-collision light requirements that were in place in the late 60s/early 70s.
Joe
WB #54