Gail at Schott can usually get you into the right size.
I wear a 46 XL sport coat and my 46 740L fits me perfectly.
With the Leather ones my favorite is the 650. Wool lined. Heavy. Nice metal buttons. Too bad I'm too tall for a good fit.
The 740N label was used on a variety of Peacoats, some leather, some wool. The 740 is the standard US made.
Another to look at is the 740C which is a more elegant version US made with leather trim. 740CE is a lighter weight version made in Canada. Both have red satin lining.
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