Cjd, yes I think the 10c is a Spiro forgery, based on the information an illustration on the excellent Stampforgeries.com website.
http://stampforgeries.com/forged-st...olumbia/#topArcherg, yes, I believe the 25c stamp is genuine, and not a forgery. My preliminary investigation seems to indicate that it is the perf 14 variety though. Whether there is reperfs or not, I think the lot is worth more than the BIN price.