Maybe a Stevens Model 425 High Power.
They weren't marked on the tang.
Don't know if they were ever made w/a PG stock or not.

Biggest caliber was 35Rem I think. But they looked a lot like a Marlin with the side ejection port.
Actually worth a fair amount if in decent condition just due to their rarity.

Marlin 410 lever actions were made on the Model 93 action w/the loading port elongated a little. Definetly had a 'bulbous' forend! Finger grooves on the sides of the field grade forend. Checkering on the rare deluxe grade.
Tangs were marked 'Marlin/410' but most anything can happen in a factory setting.

Either of these should have barrel markings noting the manufacturer. But those and tang markings if they were ever there can disappear under a refinishers file and wheel.

FWIW,,
Marlin even played with a lever action shotgun on the Model 57 Levermatic action. It never got to production but several pre-production guns were built.
The barrel was from the Marlin Model 55 bolt action shotgun (the Savage 'Roper' designed gun)

I doubt they would have bothered to mark these in any way most likely as they were just made for testing purposes. Maybe one of those escaped the factory R&D vault.


Just my thoughts..