I bought one of these to day at a local shop.
"Model 144LS-B -- last generation of the 144 series, 27 inch barrel, 15/16 inch in diameter, 44 inch overall length, new Mossberg S-331 aperture, Lyman 17-A front sight, 8.5 lbs. Mfg. 1979-1985."
Here what one looks like...