Hi again,

I have 2 dado grooving planes here, one 3/4 and one 7/8 (stamped at
the back), both by Mathieson (stamped at the front).
I'm about to clean the second one, while inspecting it I noticed a
number stamped at the top near the iron throat (is it what you call
it?).
The 7/8 (the cleaned one) has "9", while the 3/4 (the dirty one) has "29".

Does anyone know if these numbers have any significance?

https://chgansdesign.files.wordpress.com/2021/01/2021-01-09_16-43-44.jpg
https://chgansdesign.files.wordpress.com/2021/01/2021-01-09_16-42-41.jpg

As well, the 3/4 is missing the iron and the wedge, but came with a
"nicker" iron.
Let me get my Stanley no 136 caliper.... :)
Hum, as far as i can tell the nicker is 3/4" wide, but the guide
(foot?) is less than that. It is clearly worn out, but even at the
base it's quite narrower.
Is this expected?

https://chgansdesign.files.wordpress.com/2021/01/2021-01-09_16-55-25.jpg
https://chgansdesign.files.wordpress.com/2021/01/2021-01-09_16-57-40.jpg


Thanks,
Chris