Gary, I'd say your gun is a higher grade than a 4E. Mine was imported by Stoeger back in the 50's and is marked "Zephyr 4E"
but your engraving is far more intensive than that on my gun. Yours looks to be a real beauty in very fine condition. The guns by Victor Sarasqueta (sidelocks) are real sleepers. Mine (a 20 ga.} is well over 50 years old and all springs and sears are fine and crisp. The ejectors are perfectly timed and shoot the empties 6 feet behind the shooter. Mine is coin finished, splinter with pistol grip, fine checkering and drop points. Enjoy your beauty! And thanks for posting the excellent photos. Chopperlump