Unusual  item, what I'm told is an aircraft gyroscope compass unit possibly from WW2 period, it came from a now long gone research station that in the 50's and 60's used many ex military items, Wellington,  fortress etc.Made by Sperry in Ottawa Canada

My knowledge is virtually zero on the subject so please use your own knowledge and assumptions.Any info would be appreciated - thanks

Heavy item in used condition  but still seems to work.