Yesterday I bought two E. F. Johnson Telegraphy Learner Sets, Johnson Catalog Number 114-110, at a going-out-of-business sale held by a local private school.
They are on reddish-stained pine bases. The keys both have shorting bars, and are made of brass. The sounders appear to be made of steel or iron, with the company name and location ("E. F. JOHNSON CO", "WASECA, MINN") stamped or engraved on one side of each armature bar. The underside of each base has a set of connection diagrams for single- and double-set operation.
One set is missing the return spring for its key. Neither has been treated gently, and both have been grossly maladjusted in the setup. Any hints or links for getting a replacement return spring for the key will be gratefully accepted.