I agree Dave ,
That catalog looked like production parts photos. Over the years I have been fortunate to have had several previously unopened SAI and Ford OTC tachs and they were all bottom logo versions. If you look at 252 "carryovers " and the rest of a 1,000 unit order , you would "potentially" have 748 (or so) '66 models with them. I wish SAAC had SAI purchase orders in their stash of company paperwork , it would be an eye opener.
Randy