Actually you can't infer that from my statement. I am saying that all of the C&J Peals I have handled have had the block font. I can not say for certain whether all of the block font shoes I have handled have been C&J.
I use a combination of indicators to determine whether a shoe is C&J: font, type of marking inside the shoe, and last number. Since BB doesn't show photos of the inside wall markings, which include last number, then being able to handle the shoes makes ID much easier. Look for the last number inside the shoe and check it against the C&J numbers. 240 is common but there are others. The C&J shoes use handwritten markings on the inside while the others usually have numbers and letters. And to clarify, I wouldn't swear that all non C&J shoes have machine printed size/stock #/last info, but that may be the case.
It is my opinion that having a C&J last number is the most accurate single indicator of a C&J Peal shoe.