I have a few Graham watches. Besides Graham, I now only collect watches with in-house movements from brands such as Breitling, Omega, Montblanc and Carl F Bucherer. That means the only watches without in-house movement I would like to collect is Graham because its design is so unique and recognizable and its built quality is good enough. If I haven't too many Graham, I will buy this one!
On the contrary, I like good watches that are lack of 2nd hand market so that I can buy them with big discount.