This multi-scale chronograph has been preserved incredibly over the years, now appearing
link in an honest state of condition with evenly developed patina. Moreover, the case itself is interesting. Its construction is similar
link to a clamshell-style case, but unlike that
link design, it's all held together using a screw back instead of the usual set of four screws. You just don't see these everyday, and for that reason, it's significant.