If any second-hand dealer, licensed as aforesaid, his clerk, agent, servant, or employé, shall violate any of the provisions of this act, or if any licensed second-hand dealer is convicted of robbery, burglary, larceny, receiving stolen goods, or any other crime involving the unlawful obtaining of personal property, or for any other sufficient cause, the director of public safety or superintendent of police shall revoke such license.
53 P.S. § 25256