GYOKUCHO S-300 WOODWORKING RAZOR SAW A-TYPE SPARE BLADE (240 MM/ 1.5 MM PITCH)
Easy to order, fast shipping. I bought my first saw, blade and handle 25 years ago from who know who, and it was time for a replacement blade.
The blade has a very distinctive cut out for the knob that secures the blade to the handle. This blade fit perfectly, snuggled right into the stiffener and the knob secured the blade on the first attempt. Impressive!