I will list here some of most influential Bullmastiff after 70's and they peds and Kennels. Blackslate Span Am. CH Blackslate's Boston Blackie M WF511087 19/12/1983 He was breed in US, and travelled to Scandinavia, Germany, Spain leaving offspring in very country he visited. http://www.british-bullmastiffs.co.uk/cgi-bin/geneal.pl?op=tree&index=4764&gens=5&db=bullmastiff.dbw CH Hurry Vom Frankental Of Jobull (imp) M V02 08/08/1992 They have Blackslate in dam and Pitsman on Sire so as Tailwynde's on both sides. One of the powerfull brindle dog from Frankentall kennel. http://www.british-bullmastiffs.co.uk/cgi-bin/geneal.pl?op=tree&index=21391&gens=5&db=bullmastiff.dbw Copperfield Kennel (1934) http://www.copperfield-bullmastiffs.co.uk/ Copperfield are most from Bulstaff and Oldwell blood CH Copperfield Sampson M E1 22/12/1979 http://www.british-bullmastiffs.co.uk/cgi-bin/geneal.pl?op=tree&index=12323&gens=5&db=bullmastiff.dbw Am. CH Dox Highwater Mark M WP495596/04 09/07/1993 This dog is one of the blood we have here in Brazil. http://www.british-bullmastiffs.co.uk/cgi-bin/geneal.pl?op=tree&index=15335&gens=5&db=bullmastiff.dbw Those dogs represent some of excelent modern dogs.