Stanley plane iron dating
The later version with a rough surface, painted frog and cheesy lateral lever are not worth crap as users. Transitional Planes Questions and/or comments, start a topic on the forum I’ve been trying to force myself to catalog my plane collection.This is an area where the type study is very weak, in my opinion.But it's understandable since there are so many configurations of these planes.
This is located below the frog, and engages a fork that is screwed to the frog.
Starting at type 16, with the introduction of the Ogee top on the frog, it herald the end of the solid surface frog and it is all downhill in quality from there.
Mind you some of these earliest Ogee frog can still be fettle pretty good and can gives excellent results.
I can't date accurately when each of these lever cap treatments occurred, but I can list the order in which I believe they were made: The lever cap is machined and finished as before, with the notched rectangle's background japanned.
I believe this to be the earliest since the earliest Bed Rock planes have lever caps of the same treatment (Bed Rock lever caps always had some embossing on them, and the earliest ones have the japanned background). It may have been for a large customer, like 's school system, to signify that these planes belonged to someone else as an attempt to counter those with bad intent.
That is why when replacing the blade with after market blade/cap iron, from various other makers, you can easily ran into problems.