The S-293 is the replacement blade for the Gyokucho Atsuba No. 293, a 180 mm kataba pull saw for crosscutting boards, sheet goods and small parts.
It has the same specs as the blade on the saw: 0.5 mm thick and nickel plated, with crosscut teeth at a 1.5 mm pitch (16.9 TPI) and a rounded tip with unset teeth that starts a cut in the middle of a panel. The teeth are impulse hardened, so they stay sharp a long time but aren't meant to be filed. When the teeth dull, fit a new blade and keep your handle.
Gyokucho saws are made in Miki, Hyogo, by Razorsaw Kogyo, which was set up in 1969 when it developed the replaceable-blade saw. Gyokucho Sangyo, its sales company since 1975, sells them.