Zoso1967 wroteBy looking around a bit more the model i have is the earlier not the L. If anyone has one and could provide Measurements or photos I’d give it a go on my milling machine.
Instructions for the “early” 179IM shows the following on pg. 7:
EXTRA EQUIPMENT
SPECIAL BLOCKS FOR ILCO KEY DUPLICATING MACHINES
For holding properly certain types of cylinder keys in vise, it is necessary
to insert special blocking. Ilco special blocks are designed especially for
Ilco key machines, and may be purchased as extra equipment. The following
blocks are available:
33AD - For holding offset keys used on 1933 and 1934
Chrysler line cars (such as key blank No. 1122ZP
etc.)
34BX - For holding B & S double sided keys (such as No.
1198C etc.)
22B - For holding key blanks used for Hurd Tire Lock
in 1934 Chevrolet (key blank No. 1125L).
22CH - For holding and gauging Chicago keys (such as No.
1041D etc.).
27BX - For holding and gauging "Best" type key blanks
(such as No. 1114 etc.).
38B - For holding and gauging Ilco No. 1198CN key
blanks, and other types of corrugated key blanks.
Pete Schifferli
[unknown]