A projection head thought to be a model SRB. exhibited with panels removed to show the operational parts within. BTH projectors were usually to be found in Odeon projection rooms equipped with BTH arc lamps.
British Thompson Houston, Rugby
Museum of Cinema Technology (PPT)/donation
British Thompson Houston, Rugby, “PROJECTION HEAD,” Curzon Cinema Collection, accessed April 3, 2020, https://curzoncollection.omeka.net/items/show/238.