i was looking at my corbin ring cylinder from the St Paul Hotel, just yesterday, and when I saw this, I thought it was virtually the same, but when I saw it beside the medeco, this gives a different impression of size, its definately bigger than corbins ring cylinder,
Thanks for showing the pick
obviously not the mogul, as it dosent have the angled in pins, but likely part of a system where both the simpler locks and the high security types are used in the same institution for different required levels of security.