at least as far as i've seen so far. unless your just using that rule of thumb on the dato 45's and the 5100 carreras (that i have seen so far) the rule doesn't work. the carrera cased seafarer that Jeff has? it has a signed crown and smooth pushers. also even the 12 hour 60's 2447 cased carreras? see link below....

these models turn the rule of thumb useless. so far with the exception of the dato 45's and the 5100 carreras, the rule seems to be more like the autavias on which has which crown and pushers.

it was a good idea, but.....we should just be glad that heuer didn't do as many variations of say a carrera, as omega did with a seamaster!! the main and only reason i haven't made my jump into omegas is the sheer numbers of correct variations from the 60's/70's...it's mind boggling!:)

j.h.