Heteromorph Ammonite Madagascar - real?

[Harare13]

Hi all,

 

Have been out of the collecting game for a while but bought this in Madagascar recently. 
 

I don’t have much experience with heteromorph ammonites and was wondering if anyone could give some insight on to whether it is real or anything else about it?

 

Its quite big but I unfortunately don’t have a measuring tape with me. 

 

Thanks in advance!

[RJB]

I have not seen these or have any experience with them, but it looks heavily restored?

 

RB

[Wrangellian]

Weird... I was not aware that Douvilleiceras was a heteromorph!

I think someone took pieces of various-sized Douvilleiceras specimens and joined them together to look like a heteromorph, so I'd call that one a frankenfossil.