A while ago I had a discussion about antique clocks, talking about the popular styles shapes and sizes and what to expect to pay. I thought it would be worth adding a bit of information about another kind of antique, this being the anniversary clock. There seems to be quite a bit of interest in these little beauties, probably because of their compact size and often beautifully decorated and detailed presentation. The anniversary clock is sometimes also referred to as a “400 day clock”. This is because they are designed to run for an amazingly long time between windings – up to 400 days, or, as their name suggests, between anniversaries – a full year. Notice the very delicate torsion spring pendulum, oscillating first one way then the other. Once in motion, you cannot disturb this mechanism – it will interfere with the timekeeping, and will need to be reset. Although this clock is quite educational in terms of having a lot of the internal mechanism exposed, it really is not suited to being played with by the kids. They are very delicate, and replacing a broken glass cover is virtually impossible. First built in the late 1800’s and popularized in the early 1900’s, expect to pay at least $300USD for a well restored example, and potentially quite a bit more for one of the famous gold plated and silver inlaid ones by the likes of the Haller & Sohne Co. Certainly an eye catching piece for the mantle or a study, be aware that time keeping is not the best feature. 400-day clocks have a reputation for losing several minutes a week, and so do need a tweak regularly. Anniversary clocks are not as visually dominating as say old wall or long case clocks, so are a lot easier to integrate into a living antique collection. Once again antique dealers may try to sell them, but beware of the difference between a superficial restoration, and genuine clock maker who cleans and rebuilds everything with passion.