‘Proof’ Export Example, with 21 jewels (? original hands): The Seven Star divers were made with a range of dial colours – black, silver, blue, orange and red, and all had day and date complications (see image galleries). Only models with an external bezel were made with this movement.ĭials and case backs on the Seven Star divers are marked ‘Parawater’ or ‘Waterproof’ (export models?) since they precede the early 1970s when manufacturers had to change to water ‘resistant’. The second movement is the 7270 with 21 jewels, a calibre used in the Seven Star V2 range and introduced in 1969, with hand-winding, and running at 21,600 bph. NB: I have previously referred to this model as a ‘compressor’ model – however I am now aware that this is not correct, so I have edited this page to reflect that and refer to it as a ‘twin crown’ model. Two case types are used, one a conventional type with external bezel (I believe this is bi-directional) and screw down crown, the other a twin crown type with internal rotating bezel turned by a second crown. This is a non-hacking, hand wind-able calibre running at 18,000 beats per hour (bph). The first is the 5270 movement with 21 or 23 jewels, first launched in 1965. If you have good/better images of any of the models, or indeed any I have missed, and you are happy to let me use them on this page (with acknowledgement of course) please let me know.Ĭitizen’s 100m divers are part of the Seven Star range, and two movements were used. I have used the images only to provide supporting information for this page. I wish to generally acknowledge and credit the owners of these images here, and if you are the owner please let me know, via the ‘comment’ facility, so I can either credit them fully or remove them if you wish. Where possible I have credited images I’ve saved from the internet, but many I’m afraid I am unable to credit. This marking is usually seen on divers, but not exclusively so. However, a number of the models are stamped with an alternative marking for a screw down water proof type, namely ‘OR-O’. All the divers are automatics.Ĭase backs are often stamped with the case type in the usual way, e.g. they have a moveable external or internal bezel, and lumed hands and markers which can be used under water to time a dive. The divers are grouped by depth rating (starting at 100 meters), and I have included only models which can be described as ‘true’ divers, i.e. This is an area of information that I hope can be clarified in the future. I believe it’s likely that some divers would not have been brought to the market in the same year the movement was first produced. I have included dates against each movement number, which is the date I understand the movement was first produced, but this may not be the year when the diver model using that movement was introduced. They are not included here, at least for the time being, since I have not got the necessary reference material. I indicate in the article with a ‘?’ (sometimes with notes as well) where I am not entirely sure about the data I’ve gathered, and I welcome any comments about the information so it can be developed and firmed up over time.Īlthough this page covers Citizen’s mechanical divers, I appreciate that they also produced some excellent quartz models in the late 1970s, most notably the 600m rated Crystron. I hope information can be added later, or errors corrected, with the help of fellow collectors so it as complete as possible. Although I’ve tried to make it as comprehensive as possible, there is little information available elsewhere so I regard it as ‘work in progress’. This page brings them all together in one place as a reference point. A few are relatively well known, but others are not and are rarely seen. Citizen produced a range of divers in their 1960s and 1970s line-up.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |