@hoipolloi: don´t mix up the 2 versions
1) the Techron had the much earlier movement lacking a shock-protection
These movements had a bad galvanic coating which turned dark very fast.
2) the watch you called "2254 with military dial" is not a 2254 (altough stamped in the caseback) - it is a cross-reference to 2254 and its correct reference is CK 2337 (although not stamped but verified in the Omega archive). Only the chronometer has the ref. CK 2254.
It has a different movement: 18 jewel - yes,
but with Incabloc and much better galvanic plating - they often shine like new even after 70 years.
Also the CK 2423 had this later type of movement.
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