Guesses on what bayonet this fellow is carrying?

It looks like a VZ23 long (for VZ98/29) or FN1924 long with muzzle rings removed, but can't be either. In any case, that guy is not shy about showing off his stripes.

Didn't I see him on Hogan's Heroes?

Maybe it is not as long as it appears in the photo and is an Sg98/14.

There is something about the photo that makes the scabbard look long. Maybe Sgt. Schultz is not only fat, but also short and fat.

If you take the overall handle length and divide the scabbard by the handle length, the scabbard seems too short for an FN1924 long and about right for an Sg89/14.

Added: Maybe Sgt. Schultz is really tiny and that is the reason his stripes are so big.

I'm thinking that it is a commercial dress bayonet, because the pommel appears to be the KS98 stylized "birdshead" type. The crosspiece is very thin, compared to a service bayonet. Some KS98 dress variants had a thin crosspiece with no lower fingerguard. The blade is certainly longer than 250 cm., however, dress bayonets varied a lot. I'm not a dress bayonet person, but those are my observations.

It looks to me like the bird's head you see is just a trick of shadow. The top of the bayonet (end of pommel) appears to be flat.

I believe its a SG14 piece. It has a 31cm long blade? . best regards,Andy

I agree with marysdad. Looks to me like a KS98 style pommel. Try downloading the photo and blowing it up to 400%. I'd say it's a commercial dress piece.

I believe it is a S14bayonet because of it's length and there was no 1924 or VZ23 at the time.

Our "elderly" Landwehrman has a taste for the ostentatious doesn't he? I think it is a private purchase, walking out Ks98 bayonet. They were made in two lengths and this is, without a doubt, the long version.

It could be only pionier version as there is no crossguard longer part, same the pommel is no eagle head, the blade lenght is probably important , dont saw 30cm long blades, when the handgrip is 130mm the 2x lenght of blade remain a 4cm to 30cm, the grips looks like wood? not chequered? it could be walking out bayonet but only in SG84/98 manner not as KS98.

It's an S14 most probably made by Bayard.
Only Bayard and Samsonwerk made ones have that reinforcement where the pommel meets the tang (visible when blowing up the photo). Samsonwerk made ones have a round upper part of the top of the pommel, the Bayard one that was made in Belgium during WW1, had an flatter kind of FN1924 shaped pommel.