[Seaplanes]

Thanks a lot Rasmussen. Actually I got a copy of this log book and its details was incorporated in my re-construction of the He 51 production. Unfortunately I forgot to mention this source in my e-mail.

The two initial He 51 prototypes delivered in February 1934 were:
He 51a W.Nr. 0429 D-2726. Land plane prototype.
He 51b W.Nr. 0430 D-2727. This aircraft was totally destroyed in a hangar fire in Warnemünde on 17. June 1934. Floatplane prototype. In the accident report this aircraft was given the designation He51B with a capital "B". This may be the reason why others have concluded that this was the designation for all He 51 floatplanes.