Catch me on INSTAGRAM https://instagram.com/. It's a code for the type of case. Your example (GN-4-S), which is very commonly seen, indicates a water resistant type - with a screw down case back and sealed crystal. Here's a diagram of two types of 'GN' case (2 & 3). You can see the different type of crystal gaskets in the cross sections.
Every man needs a real diver watch, and every woman (either a girlfriend or a wife of a true watch enthusiast) is going to get one eventually. 🙂
This is the vintage Citizen ladies diver. This is the ultimate one, the real one.
Citizen Gn 4 S Manual
This model has all the specifications that define a diver. My better half says it is even better than the men model of the same time frame, witch is the 52-0110 presented in the picture. I tend to agree with her (well, I have no choice but to agree with her 🙂 ). Read about my watch here: https://vintagecitizenwatches.com/2013/12/24/citizen-automatic-diver-150m-52-0110/ Mine was made in 1978 and hers in 1980.
Citizen Gn 4 S Instructions
The case is small, made in polished stainless steel but with a brushed face that doesn’t reflect light the same way as a polished surface would. This is mandatory for a diver so the time can be easily read without light interference. Compared to the men model, this one has some other elements that gives it a nice diving touch: crown guards, lug holes (for easily changing the strap) and unidirectional rotating bezel (60 clicks). By contrast, the big brother has only a friction type bidirectional bezel, no crown guards and no lug holes. The water resistance is similar (150m) and both of them have a large screw-in crown, an easy grip bezel with a beautiful aluminum insert and a thick flat mineral crystal. The underside of the crystal is concave, magnifying the hands and the dial.
The dial and the hands are very similar. Both the ladies watch and the men watch have a black dial with applied luminous hour markers. The hands are similar (Mercedes hours hand, spade minutes hand and a seconds hand with a luminous dot close to the tip). The small brother has a day and date window. Both of them are marked in the same way: Citizen, automatic, 21 jewels, water resistant, 150m. My girlfriend’s watch has a raised ring part of the dial with seconds markers. That gives a great depth feeling to the entire watch face.
Citizen Gn-4 Setting Guide
The movement is small too, suited for the small case. It is an automatic, 21 jewels movement. Citizen named it calibre 6601, and can be found in a variety of ladies watches. Not much to say about it except the fact that it displays both the day and the date, can be hand wound and a particularity is the fact the date changes by pulling repeatedly the crown.
The strap is the original (pretty impressive for a 30 years old watch), mint condition rubber, with a stainless steel buckle. It is very comfortable, very easy to find the perfect adjustment hole. The width at the lugs end is 14 mm, but it integrates really well with the flowing case design. I think it would look good on nato (still looking for one so small) and i have already ordered a mesh stainless steel bracelet for it.
As a conclusion, all I can say that my diving watch found it’s better half and so did I. 🙂
Read more about vintage Citizen divers here: