Zenith appears to be one of the better companies when it comes to being upfront about their service costs (I found this on their website). The Striking 10th is a caliber 4052B, which should fall under their 2B or "El Primero w/ Complication" category. 300 CHF for partial service, 750 CHF for full service (I would expect pricing to be slightly different depending on your geographic location). The pricing is about on par with what I've seen from companies like Rolex, Omega, IWC, etc. I'd say you'd have to be quite lucky for a service center to quote you the partial service price, most likely they'll say the watch needs a full service. Also, note that this price often does NOT include external components, so if you need a pusher or crystal replaced, that will be extra. Hope this helps!