This Week’s Featured Watch #8 – the Crystal Seven, 27 jewels

In 1965 Citizen launched a major line of watches called the ‘Crystal Seven’. The name is derived from the type of glass used, the first time Citizen used ‘crystal’ glass – I’m not sure if this was sapphire or equated for example to Seiko’s ‘Hardlex’ mineral glass. The ‘Seven’  continued Citizen’s use of this title first seen a year earlier, in 1964, in both auto-dater and hand-winding models.

Using automatic movements (the 52xx series) with oscillating weights rather than the circular geared rotors as seen in earlier ‘Jets’, the new range was extensive in terms of both jeweling and models. It was Citizen’s main automatic line of watches at that time, and although production was not long-lived – there are no Crystal Sevens in the 1971 catalog – it was clearly successful, and is the most commonly seen vintage Citizen automatic watch in the on-line auctions.  No doubt as a result of this, an example of the Crystal Sevens proved to be my first vintage Citizen purchase, and since I was impressed with its quality it became a key influence in my collecting focus.

The model I acquired sits more or less in the middle of the line, having 27 jewels – the jeweling ranges from 21 to a whopping 43, Citizen’s highest jeweling of any of its watches. Original prices reflected the jewel count, starting at JPY9,800 (21j) to JPY19,500 (43j). Mine would have cost about JPY13,500 when it was made in 1968:

On it’s very comfortable ‘beads of rice’ bracelet, the watch features a blueish silver dial and has a good quality set of hands with black centres and a well finished chapter ring:

The back is marked with the Crystal Seven logo, and shows a production date of April 1968:

The movement runs at 18,000 beats per hour, and typically the rotor is signed and includes the jewel count:

Given the extensive model line-up, this won’t be the only Crystal Seven to feature here – which will also reflect the importance and popularity of this watch in its day – whilst a good example of this line is a great buy either for regular use or as a collection piece.

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7 Responses to This Week’s Featured Watch #8 – the Crystal Seven, 27 jewels

  1. marco says:

    Tengo un Citizen Automatic Cristal Seven de 27 jewels. japan 1323-0
    en la parte posterior dice:Cristal Seven automatic 80400140 OR-D-2 AC5652905-T C.G.P.
    La caja tiene 18kg 10mics le falta estencible
    ¿Qué me pueden decir de este Citizen que me acaban de regalar?

    • sweephand says:

      Hola Marco – gracias por su pregunta. Estoy utilizando ‘ Babelfish’ para traducir, así que espero que es aceptable para usted. Españoles primero, entonces en inglés. Sus siete cristalinos es interesantes – ‘ OR-D-2’ es el tipo código del caso, que es inusual en uno de éstos. El número de serie nos dice que el suyo fue hecho en abril de 1968 y es oro plateado, ‘ CGP’ significa ‘ Oro Plated’ del ciudadano;. El oro es 18k y es 10 micrones de grueso. ¿Está usted seguro que el número de modelo está correcto? Sevens generalmente cristalino tiene el código ‘ ACSS’ ¿entonces un número – es tan el suyo ACSS52905? El ‘ 52’ la parte demuestra que el movimiento es un 52xx – si usted puede conseguir el saque que usted puede encontrar el número del movimiento estampado cerca de la rueda de balance. ¡Espero esto sea provechoso – me deja saber si usted tiene otras preguntas – y por favor decirme si la traducción es pobre, yo pueda poder pedir que un amigo español la traduzca correctamente!

      Hi Marco – thanks for your question. I am using ‘Babelfish’ to translate, so I hope it is ok for you. Spanish first, then in English….

      Your Crystal Seven is interesting – ‘OR-D-2’ is the case type code, which is unusual on one of these. The serial number tells us that yours was made in April 1968 and is gold plated, ‘CGP’ means ‘Citizen Gold Plated’. The gold is 18k and is 10 microns thick. Are you sure that the model number is correct? Usually Crystal Sevens have the code ‘ACSS’ then a number – so is yours ACSS52905? The ’52’ part shows that the movement is a 52xx – if you can get the back off you can find the movement number stamped near the balance wheel.

      I hope this is helpful – let me know if you have other questions – and please tell me if the translation is poor, I may be able to ask a Spanish friend to translate it properly!

  2. alfredo says:

    hola como estas? navegando por web llegue a esta pagina , quizas pueda darme una mano, disculpa no manejo ingles.
    tengo un reloj CITIZEN CRISTAL SEVEN, y quisiera algún dato de el ,en el reverso tiene las siguientes inripciones : ” para water / star/ acss2804a-y/55 ” ( en circulo esta estos datos) y en el centro “CRISTAL SEVEN AUTOMATIC 80800341. es una pea que no pueda subir una foto asi lo mirabas, te dejo un correo si podrías mandar alguna info:**********, desde ya mil gracias

  3. diego says:

    Hola amigo tengo regalo que me dieron es un citizen crystal seven automatic 27 jewels este es su número acsg 2818-y . Y hay otro número es este 80600548 gn podrías decirme que es ??

    • sweephand says:

      Hola Diego – gracias por visitar mi blog. Tienes un chapado en oro ‘ Citizen Crystal 7’. ACSG2818 es el número de modelo, que demuestra que es un modelo plateado oro. El número de serie (80600548) nos dice que fue hecho en junio de 1968. ‘GN’ es el tipo de caso, lo que significa que es un tipo resistente al agua con un tornillo por detrás y un cristal de la prueba del agua. El movimiento de 27 joya es el mismo que en mi ejemplo.


  4. Di Lin says:

    Hi Stephen
    I recently acquired a 1967 Crystal Seven 27j from Japan. Interesting the Citizen logo is italicized and applied. There were quite a few pieces with that particular type of logo. I have noticed the same logo font in the Crystal Dates as well (printed, instead of applied).
    Does the italicized logo signify an export model, or a transitional logo period?
    Thank you.

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