Always thought the u/c indicator was a red herring. Unusual to have this important indicator on a panel with lesser important matters such as stewardess call button etc. A search on ebay under item 141036251297 gives an idea of an Avro Tudor cockpit panel but your particular panel is likely to be out of photo shot probably elsewhere such as the engineers panel. Don’t forget that the Hermes and Ambassadors were about also, especially with tricycle undercarriages. From what I have seen of these cockpits your panels would not go a miss in these aircraft. There were some good photos of the Duxford Hermes cockpit layout published on this forum some years back. A search may dig these out of the archives if you are lucky.