We have many thermionic valves in the Museum, some in cases not displayed, some in resplendent cabinets displayed, some unique and valuable, some in purposely built collections which are displayed, some which require the Starboard Watch to lift and shift, and some, nay many, in boxes awaiting sorting. Our man Mike RUTLAND does that, currently spending his Monday's from 0700 until 1500 [both times approximate] delving into cardboard boxes [which keep on coming] and then offering what he finds to an in-house database of valves, subsequently stored for future use or reference.  Tiresome and boring some might say [or think] but to us in the Museum, having say, accepted a 1930's receiver into our collection [remember, we refurbish - set to work - and sell-on gifts if we already have that model as an exhibit]  it's life and death could depend upon a specific or suitable alternative valve.  Thus Mike is regularly consulted about his stock-in-trade and rarely does he fail to come up with the 'goodies'. We do not intend to challenge dedicated VALVE COLLECTIONS or MUSEUMS, the largest [as we know it] in private hands and that also in Hampshire !] for they are recognised experts in all things thermionic,  but at least our collection is a ready-use store, acting as a 'zimmer-frame' to the geriatrics communication pieces of latter day times which we are entrusted with. 

If you have a query about a specific valve, or have a valve or valves you want shut of, then why not call the Museum by telephone.