[Seaplanes]

I have checked the RLM Aircraft programmes No. 222, 223, 224, 225, 226 and 227 and have found no evidence that the He 177 series production were produced by anyone else than Arado Brandenburg (ArB) and Heinkel Oranienburg (HWO). Some conversion work was undertaken by DLH Tempelhof (DLHT) and the following abbreviated company names not 100% certain to me: GHF/LBG, RWE, FWE, EHF/LBG. I believe EHF is abbreviated for Ernst Heinkel Flugzeugwerke Marienehe (Rostock)
Can anyone help out here.

I have the following He 177 series production (excluding prototypes and pre-production series):
He 177A-1 130 all delivered by ArB
He 177A-3 159 all delivered by ArB
He 177A-3 88 all delivered by HWO
He 177A-3 188 all delivered by ArB with Kehl III installations
He 177A-3 30 all delivered by ArB with Kehl IV installations
He 177A-5 70 all delivered by HWO
He 177A-5 279 all delivered by ArB with Kehl V installations

Included in the figures above is the following conversions:

He 177A-0/A-1 12 aircraft converted to Zerströrers by EHF

He 177A-1 34 aircraft converted by EHF/LGB with Kehl III

Some aircraft were converted from old A-3 standard to new A-3 standard by DHLT, RWE and FWE.