Kessler made a million or so shotguns, late '40s, early '50s. Mostly bolt actions, but also the lever actions.
Marlin used the mechanical design in their M57 series of rifles.
A 16 is likely less common than a 12. Kesslers are around in Canada, you don't see them all that often.
Because the stock has been altered, value to a collector would be reduced. This gun would be of interest as a bit of a novelty.
$150 would be reasonable.