Sometimes I am confused by by roller cancels that have the appearance of precancels. How do you tell the difference between them on this stamp? The reason I ask, is that precancels of this type typically have the city, state each with their own top/bottom bars, but these examples have a single bar separating each city, state instance.
It can be confusing. The PSS catalog editors (gatekeepers) have an esoteric set of guidelines for inclusion. In some cases, the scholarship/research into whether a cancel is really a precancel was done decades ago when the cancels were current. The best generalization: if it is in the catalog now it is a real precancel, if it is not in the catalog now - it is not and will never be reconsidered.