I would like some information on the Calculator 110.633. I know that is 45.5 mm wide but I would like to know the exact lug to lug measurement since the lugs are integral to the case and do not extend past the edge of the case. Also width bracelet or strap does the Calculator have? Also on the original corfam strap or steel bracelet is the the buckle 16mm? Final question, how many Heuer Calculators were manufactured in their 8 year run from 1972 to 1980? I assume the answer would be in Amo Haslinger's book Heuer Chronographs, but I cannot find a copy. Thanks in advance for answers.