Hello Dutchman

There are two variations of the Hobacher IAB.
The sheet metal hinge example that Rod shows and the block hinge variant.

Both have the "?" style catch directly soldered to the reverse and the obverse design are virtually identical on both.

Here is my block hinge example.

x WH B1 o.jpg (104.5 KB, 53 downloads)
x WH B1 r.jpg (87.46 KB, 53 downloads)

Best Regards, fischer