Stanley Plane blades question - your help needed

[Martin Cash]

Here is a question for the Stanley bench plane experts.
I have several Stanley bench planes including some transitionals. I have noticed that some of them have blades made with laminated steel on the cutting edge.
My question is - when did Stanley stop making laminated blades for their hand planes?
My blades are of the V-logo type - so around Type 11 ish -1910 or so.
Also - is it safe to assume that all Stanley blades before this were of laminated construction?
I look forward to your replies
Thanks
MC

[phil harold]

I think till about the mid 40's they made laminated blades

[Martin Cash]

I think till about the mid 40's they made laminated blades

Many thanks Phil