Thanks Bill,
Interesting. Would like to know more but it looks like it will forever be a mystery.
Don’t like the way the shank bottom is attached to the fluke so close to the fluke tip. I would think that spot would be easily compacted w mud.
What made me finally decide it was Spade was when you posted the pics of the anchors in the van. The large shape of the concave part of the fluke was a giveaway ... pure Spade. Coupled w the profile image of the shank. Looks like a very heavy shank. May have been trying to get by w mild steel.
I am curious about the other details but ....?