You are bidding for the vintage   Air Capacitor 450 pF  Aluminum Tuning HAM crystal radio  ... used ... capacitance of the section is about  450 pF  ... aluminum body and silvered plates ... body measures 130 x 100 x 90 mm, weight about 1.3 kg ... two opposite shafts  with trimming / fine tuning section ... all numbers are approximative ... actual photos are part of description ... one supporting ceramic rod is broken