Cheers, Beachdog. I agree the characters don’t look like the 1937 examples on the BoS site and they don’t look like WLDRs for 1938–40 either. But I can’t explain why. As I mentioned above, some of the characters appear more like the types introduced part of the way through the 1937 model year and used for later-1937 general production machines. The 5 is also intriguing because it appears more like an early-37 5 than a later-37 5.
I have a clearer photo of the serial number from some time ago and it too is probably from eBay because that’s where most of my pictures originate. In my earlier photo I see no sign that anything untoward happened to the number boss. But it wasn’t an assembled machine then and I only have photos of the serial number and the belly numbers. No cylinders were attached and neither was the scavenge pump. I don’t know if the seller then was the same person as now though as I didn’t record seller/owner details. The belly numbers are as described in the current ad and I can’t see any sign that anything untoward happened to the bottom of the cases. However, although the 7 in the year portion appears normal for 1937, the 7 in the sequence portion is the same style and that is not what I'd expect for 1937 belly numbers. I cannot explain it. I’m not convinced about the 6/9 in the belly numbers either, even though it is a rounded style.