Oldest available kits

I have unassembled borax 20 mule team that my dad bought in 1965.

Picked up the Mono 1/48 Mosquito awhile back, stamped 1966 on a horizontal stab.  Could be built as a F/B, Bomber or night fighter.  Molded in gray, black, and clear.  Suprisingly has recessed panel lines.  Decent fit and not much flash.

Do you mean oldest kit still being manufactured ( but possibly under a new name )

Or.... oldest kit still sitting on the store shelf  for the past 40 years..... and still has a $1.99 price tag on it?

The oldest ones we see here are the early Airfix kits that have been re-boxed. I have seen the Stirling on the shelves and that dates from 66.