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We present the historic photographic light curves of three little knownBlazars (two BL Lacs and one FSRQ), BZB J1058+5628, BZQ J1148+5254 and BZBJ1209+4119 spanning a time interval of about 50 years, mostly built using theAsiago plate archive. All objects show evident long-term variability, overwhich short-term variations are superposed. One source, BZB J1058+5628, showeda marked quasi-periodic variability of 1 mag on time scale of about 6.3 years,making it one of the few BL Lac objects with a quasi-periodic behavior.

BZBJ1058+5628: a new quasi-periodic BL Lac