Complex sentence: This has been made infinitely easier with accurate timing machines which give instantaneous timing results, where as in Breguet's time all that watchmakers had was another watch to regulate from, so results were not very exact and it could take weeks to get them.
Split into simpler sentences: This has been made infinitely easier with accurate timing machines which give instantaneous timing results, where as in Breguet's time all that watchmakers had was another watch to regulate from. So, results were not very exact and it could take weeks to get them.