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For additional information, see the Global Shipping Program terms and conditions - opens in a new window or tab. If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. Contact the seller - opens in a new window or tab and request postage to your location. If you dont follow our item condition policy for returns, you may not receive a full refund. Refunds by law: In Australia, consumers have a legal right to obtain a refund from a business if the goods purchased are faulty, not fit for purpose or dont match the sellers description. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. The key is knowing which decade the watch was produced in, and the Movement Table is useful for determining that. Citizen Gn 4 S Battery How To Interpret TheThis page attempts to show the basic types and how to interpret the information that case backs give often crucial to determining the authenticity of the watch. Each of these used various case designs, with different case materials, and the case back markings began to reflect this. I have identified three core formats, and Ill show these in the following sections, along with some of the variants that can be found one of the joys of this for the collector is the variety of case backs that occur as result. Little information is stamped on the back typically it may relate only to the case back material. During that period Citizens watch production accelerated enormously, particularly with the success in the domestic Japanese market of the Deluxe hand winder. An ever wider range of hand winding watches was produced, and in 1958 Citizen launched their first automatic, soon followed by the Jet rotored automatics of the early 1960s. Citizen Gn 4 S Battery Serial Number At ThisNot all watches had a serial number at this time, although sometimes they may be found stamped inside the case back. After looking at a fully marked example, Ill show some of the variations. Heres an example from 1963, which carries all the information to be found at that time except water resistance see the labels for their meaning. It is found on watches from the 1940s through to the late 1960s. Some gold plated and especially gold filled watches specified the thickness of the gold, in microns. Gold filled watches were also marked to show the quality of the gold used, e.g 14K. This watch has a day window only, and is therefore known as a Homer Weekly. Other models also use the Homer movement, so will carry their own model name, e.g. Newmaster. Model names on the case back are more common in the early models than later pieces. ![]() First are two Center Second models from the 1950s, one with an early Everbright back this may be an alloy back rather than stainless steel and one showing a 40 micron 14K gold filled case, with number only model designation (NB: center second models used that name on the dial, but other models like the Master and Junior also had center second case backs like these). This has a screw on type back indicated by the indentations to locate a removal tool. More and more watches were using screw on backs and less were using the snap on type more typical of the early model ranges. Case design was also developing and other case types were emerging. Here is an example of a fully marked transitional screw on back. This means these cases are one piece that have to be opened through the glass, as on this Seven. Case numbers always start with the number 4, followed by a dash and six other numbers i.e 4-123456. With the new case number system, a new model number format was also instigated: 12-3456. So for example, case number 4-520343 tells us that a movement from the 52 family is used. Later watches have Citizen Watch Co rather than just Citizen.
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