I've seen a lot of Marvbirds, played a few of them, even the very first prototype build H-357.
I'm lucky enough to know some great people that own them over the years, just not lucky enough to own one. But it had me thinking, I don't believe all H-357's are Marvbirds. When the H-357 model was a regular production guitar, it was simple guitar compared to later versions; opaque finishes, unbound dot inlay necks, slim neck profiles, standard Schaller pickups and hardware.
It wasn't as an aesthetically pleasing guitar like many that came out of the factory at that time. Essentially it was a very simple rock machine made out of neck through chunk of mahogany with glued-on wings. Just an exotic shape like the Terminator and Exterminator models.
When the model was discontinued yet available via phone call to the Marv Lamb hotline at 225 Parsons Street did it seem the H-357 really come alive. Natural finishes, exotic woods like Korina, multi-laminated five-piece necks, unique finish options, pickup options, Bigsby's, stingers, huge fat necks; it all became fair game.... No two were alike after that. The HOC forum here was booming with activity and membership, almost every new Heritage post was a unique custom order, and people shared the experiences to really push the dream of owning a Marvbird. The HOC was arguably the biggest enabler of the resurgence of the H-357 design.
But those later H-357's were vastly different than the original production line. I believe there is a distinct difference between them and what they originally factory runs started as.
In my opinion, the only thing that binds them together was two things; only Mr. Lamb could make the rough assembly and the shape of the H-357 itself. From there, the original era's of H-357's depart to the later years in the 2000's. Maybe some historians on here can tell when the H-357 made its first and last appearance in the catalog, but I believe there were several years in-between the catalog and the highly customized orders.
Please disagree with me if you like, but there really a difference between the H-357 and the Marvbird.