Rut.... see why I didn't want to opine?
JP... semi-eliptic shocks have blue and yellow swabs.
Here's some insight (or incite?) Armstrong made many shocks, but the vast majority fit into just a few Types. The rears on all Spridgets, all early big Healey, all early solid axle Triumphs, all TR10s, all early Minors, all early Morgans, and many more, are called "DAS-9". They feature a 3-5/8 mounting bolt spread. Within the group of DAS9s are many differences in valving, filler plug location, and of course arm shape, length, and swing. It would appear that during assembly line work, a run of a part number would begin with the body stamped on the lower edge of one mounting ear. (in Spridgets 7335, 7401, 8681, 10779) pistons inserted, correct valve installed, and the arms installed by colour code... identifying which arm goes with which numbered shock. (this is my conjecture)
Shocks that would have been sold to the factory for assembly-line installation could be different than those sold after the fact in-so-far-as color is concerned.
I've been told also, that the arms were not painted, but were a version of Parkerizing. There's more to be learned, and I'm all ears. But, again, I am seeing the larger picture beyond just the Spridget applications.
If I don't have the chance later, y'all have a Happy New Year!
Peter