I recently acquired a cobbled together Stanley No. 4 plane which had a Siegley blade on it .
It is marked , SsS with Siegley beneath . It was in pretty good shape so I gave it a sharpening and in the process it appears that this blade is two pieces of metal bonded /layered ? together . The new edge I created with a honing guide shows a definite difference in the texture of the steel across the newly sharpened area.
You can see a definite demarcation line across the face of the new edge.
I'm green as a gourd with my knowledge of wood planes , anyone shed some light on these blades ? It is 6.75" x 2" x 3/32 as I measure.IMG_6751.jpgIMG_6760.jpgIMG_6757.jpg I've only taken the edge through 500 grit wet or dry paper.