On Sun, Aug 29, 2021 at 7:51 AM Kirk Eppler  wrote:

>
>
>
> Somewhere I saw a table of sizes by number, maybe a Marples catalog.  Will
> add it later if I find it, but it did show a logical fractional inch
> transition .  Here is a cat cut from 1938, just listing it as sizes in a set
>
>

Here is a listing here of what they should be

Plow plane irons are numbered #1 through #8 with sizes 1/8", 3/16", 1/4",
5/16", 3/8", 7/16", 1/2", and 5/8" respectively.

Stolen from
http://tinyshopww.blogspot.com/2017/03/fixing-and-fettling-wooden-plow-plough_28
.html#:~:text=Plow%20plane%20irons%20are%20numbered,and%205%2F8%22%20respectivel
y
.

He goes into similar detail about how none of them are close to the correct
size
-- 
Kirk Eppler, who made a wedge for an Ulmia glazier rebate plane yesterday