Smoky bandit said:
All the early thrips I've found are always 21 they may flick to 22 but mostly solid 21..The wheat ones are mostly always 16 may flick to 17 sometimes .I use the 800. Interesting yours are solid 23.The only difference I have found with that chart is the 6 pence some older ones are 27.
Hey Smokey, i will take a couple out with me and do a air test then in the same ground found. The ground might have something to do with it. Acually theu were 1880-1904 english ones so that might be why. Will let your all know