Craig, I don't think your looking at a Crass model Ithaca.
As per Walt Snyder's book "The Ithaca Gun Co. from the beginning", "No Crass were produced beyond serial # 50,000."
The Lewis model started at #55,000.
The MINIER model started in 1906 with serial # 130,000 to# 151770.
There are pictures in the book of higher grade Minier guns with Krupp Steel barrels. HTH
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"Double guns are a sport and a pastime built into a beautiful package to which I attach myself when entering the great theater of autumn, those days now grow more precious because we are given so few".. Robin Lacy