The Schwinn blade forks are probably all Ashtabula.
Ashtabula's aftermarket forks for BMX use had the welded in reinforcement, but did not always have the embossed name. Most of the ones I saw back in the day did not have the embossed name. This goes for stems and cranks too.
Most Ashtabula aftermarket stuff has a black oxide finish, but some of their Chrome Moly cranks are Chrome plated and look just like postwar Schwinn cranks, but available in longer lengths than Schwinn offered. Speaking of postwar Schwinn cranks, many of those were Ashtabula too, ones marked "SA".
IIRC Schwwin may have used some of the reinforced ashtabula forks on their BMX bikes. They had been using the regular Ashtabula (non-reinforced standard duty) forks on all sorts of bikes for decades.
Ashtabula's aftermarket forks for BMX use had the welded in reinforcement, but did not always have the embossed name. Most of the ones I saw back in the day did not have the embossed name. This goes for stems and cranks too.
Most Ashtabula aftermarket stuff has a black oxide finish, but some of their Chrome Moly cranks are Chrome plated and look just like postwar Schwinn cranks, but available in longer lengths than Schwinn offered. Speaking of postwar Schwinn cranks, many of those were Ashtabula too, ones marked "SA".
IIRC Schwwin may have used some of the reinforced ashtabula forks on their BMX bikes. They had been using the regular Ashtabula (non-reinforced standard duty) forks on all sorts of bikes for decades.