269: it's definitely a Quartz. The Handbook tells you that battery changes will be needed form time to time, but doesn't describe the symptoms of imminent battery failure.
FL; thanks for the tip. If I can't find the TW co-ords, I'll give you a ring or email for the info, please. If you used Goldsmiths (the chain) I've got one in my home town, but TW's not too out of the way for me.