Don't know on the ole Chicken but I would suspect Belgian if not Haenel as noted above.

The *H is either from Haenel or one of it's craftsmen(Helmuthhauser).

It was proofed in Suhl post 1912 so I would assume a concern with a Suhl address for the listed maker. I don't know if Gustav Rätzel survived WWI. He had a Berlin address like Berlin W.8 and had ties to Zella-Mehlis, possibly thru a Frank fella. This Z-M connection might account for the Haenel effort on the tubes.

Kind Regards,

Raimey
rse