What is this,???

[Adrian]

I don't want to sound smug, but identifications of items on that site should better be ignored altogether or at least presumed incorrect until proven otherwise.

This logo does not have the slightest connection to the Org. Todt; it is the Handwerkszeichen. It is simply the symbol for the entire German Handwerk (craft), used as its official symbol from 1934 to 1994, and still used unofficially today.

See:
Handwerk

I couldn't agree more with the first statement. Snyder's site should be regarded as a joke and for entertainment purposes only.
And thank you for identifying the symbol HPL.

[don_kihotis7]

You are an asset to this forum HPL

Nick

Exactly

[ObKrieger]

So is H.A. the maker mark for Hermann Aurich perchance?