It could be. If so that would have been one of the last RV-6's they stopped making them for good in 1982, by that date the price was $359.95.

The EB RV-6 has serial plates on the mount and OTA which makes me think it is from the mid 60's, they started skipping things like that later on, and no leveling screws on the legs pushes it out of the early 60's.

Robert