What is the next watch I should get?

Moonphase makes sense.

GMT?

If you don’t know then the answer is simple…. None! Put your money in an interest bearing account until you lust for something.

Personally, my shortlist has a 1963 seagull, Vostok, or a green Seiko Alpinist, or maybe a Seakors tourbillion. Good luck!

I agree with @skydave

Take your time, enjoy your collection and keep your interest fresh with new information.

If you want a chronograph something a bit different is the Farer Carnegie

Or if you don’t like it or don’t like the idea of a manual wind how about going Japanese. The Seiko Prospex Solar Speedtimer is very popular. I’ve got the ice blue one and love it.

It’s also a very affordable brand when compared to the rest of your collection and it’s always good to have a quartz beater.

They also have an automatic Speedtimer.

But it’s much more expensive than the quartz one.

How about a square one. But not the 90° rectangular straight line type. Mire like a Santos design.

Glashütte Original Seventees Chronograph

Cartier Santos

Or, more affordable but not less interesting, the Rado True Square, especially in the Plasma High Tech Ceramic.

I love all three of these. A santos is definitely on my list.

I like all your 4 watches. Actually I have SMP green and Kahki was the first watch I bought myself. We may well share similar taste.

My 2 cents:

There are different types of watch collecting strategies, like;

1. Checking the boxes - either by the type of watches like diver/flieger/ racer/field, or by the complications

2. Collecting based on situations - for example, dress/business/sport

3. Buying whatever speaks to you

Unless your plan is to collect dozens of watches, the second approach is likely the most sensible one.

If you often find yourself in a situation where none of your watches fit well, buy one to fill that gap.

If you wear one watch far more often than others, add one to meet that situation.

With this approach, I managed to downsize my core collection to 5 + 1.

5 situations consisting of dress, business, dressy sport (for rainy business day), sport/fun and hiking.

+1 slot is kept for whatever attracts me because being logical all the time diminishes the fun😁

Appreciate the comment and yeah I am thinking the Tudor Panda Chrono and the Santos are the next two bigger purchases I make. I do like the idea of commemorating something with the watch, so may wait to do that as I am really enjoying my current collection.

What are the others in your collection?

Dress - JLC Reverso Classic Duoface Medium - this one can be dressed down too

Business - JLC Master Control Geographique (from year 2000)

Dressy Sport/Business Casual - JLC Polaris Automatic black

Sport - SMP Seaweed

Hiking - Sinn EZM3

+1 - currently vacant. Eyes on Breitling Premier Piatachio. But too expensive to buy only for the colour😂

Love all the JLC love! The Reverso is so Iconic, if I didn’t have huge wrists I would for sure get one. The Polaris was on my list of potential Chronos. We do have very similar taste.

Not that I intended to have JLCs dominating my collection but they won the competition three times😄

You should try Reverso. Some of them, like calendar or chrono are pretty large, too large for my 15.5cm wrist.

As you have similar taste and larger wrists, I would also suggest looking into Blancpain, especially bathyscaphe chrono or calendar. Their watches are so beautiful and at the same time a bit quirky, which I love. (Look at the face of their moon phase 🌝 )

I would have bought one if I had bigger wrists.