This OPS 40 is a 2-stroke engine for use in a RC racing airplane.
Designed for air race, the use of tuned exhaust pipes was recommended to reach the max 19.000 rpm.
Type: SLA = front intake / side exhaust
RCA=Air race
size 0.40" = 6.5 ccm
Although this beauty will operate as designed, because of its age (1977's) and manufacturer (Motori Monza Italia) it is a very collectable item.
This item came along with a few other very noteworthy items from a collector's estate.
The engine comes with the carburettor and all paperworks in its original box, the box might show some signs of wear
It looks like all is original, and although I am not aware of the fact, but in case any part is missing on the pictures, these are not included.