A 1920s spirit trumpet belonging to the SPR will be part of the forthcoming 'House of Fame' exhibition at Nottingham Contemporary Gallery. The exhibition is covered in a Guardian article:
There is a picture of the trumpet on the University of Cambridge website:
https://cudl.lib.cam.ac.uk/view/MS-SPR-TRUMPET/1
The trumpet was displayed at Cambridge University Library in 2016, along with other artefacts belonging to the Society:
http://tomruffles.blogspot.co.uk/2016/11/the-society-for-psychical-research-in.html
More about our extensive archive at Cambridge can be found on the website here: