ARBED BZ IIIN sheet pile section from 1963

[Tripp]

I'm looking for section properties for an ARBED BZ IIIN sheet pile section from 1963 (or earlier). I have a wall that was designed in 1963 that used this section. I've located the width (17.7 in), weight (46.9 plf), section modulus (33.3 in3/LF), moment of inertia (170.4 in4/LF), and radius of gyration (4.28 in) in an older CALTRANS Trenching and Shoring Manual. However, what I'd really like to know now is what the original thickness of the flanges was, so that I can determine a rate of corrosion.

Does anyone have a copy of an old ARBED handbook/manual (from about 1963 or earlier) that has the section properties for this section (BZ IIIN)?

TIA
-Tripp