Two NOS Philips QB3.5/750, also named 6156, in original boxes. Seems to be the same as 4-250A but no metal shell on the bases, the Philips with metal shell are called QB3.5/750GA but data are the same. If interested please give me an offer via e-mail to sm5dqc at algonet.se I will then calculate shipping cost depending on country to send to. 73 de Osten SM5DQC