I am fairly new to the pre war cards but I tried to go for quality over quantity. I found both of these on Ebay and were able to pick them up for reasonable prices. The Jack Johnson was listed as a t218 so I got a steal, but I honestly don't know what it's true value is. It is only a pop of 7 between PSA and SGC combined. The W555 is listed incorrectly as a 1907, but I believe it is a 1909 card. However, it is also a super low pop (I think less than 10). It was discovered a few years ago that the w555 should actually be considered a candy card and not a "w" strip card.
Happy collecting!!