International bid 640

[Zebbedee]

Anyone know the weight of an international btd640 crawler and also what is the difference between a btd6 and a btd 640 thanks

 

[forblue]

BTD6, 7280 - 7800 lb, 50.5 hp.
BTD 640 ? 40 hp

May not be spot on as hp figures were published early on so engines may have been improved later, weight of 640 i would have thought about same.