The Boeing 737-200 FCOM displays a Bulletin that lists the cross-over speed history including a table of appropriate speeds versus flap settings and weights. In short, the design of the 737-100 and 200's means these types do not have a crossover speed limitation - unless the rudder pressure reducer modification is either not installed or unserviceable - which where reference to the revised speeds is needed. So you can relax when flying a serviceable 737-100 or 200. Not so the Classics where crossover speeds are published. I think my statement is reasonably accurate but reference to the Boeing published FCOM (not necessarily the company published FCOM!) and associated Flight Manual should confirm.