After seeing some of these beauties from @marking mad and @modest proposal I've decided to start hunting. Still looking at the incredible range in this wonderful movement, so who led welcome photos and advice also.
Good choice going with a cal 89, it's a great movement! My cal 89 was previously owned by Dennis and Alam, so I am the lucky recipient of their generosity and enabling, as I've posted previously. I've included the collage from the earlier post to show just how versatile the watches can be - they go with formal and smart casual attire, as shown on the wrists of Dennis (upper left), Alam (upper right), and myself (lower right). And the little spoof on the lower left hopefully nudges someone on this forum to sell one to you Good luck!
I'd buy that watch back in a NY minute. It might be one of the biggest selling regrets I've made, until I look at the Eternamatic I got to replace it. The ribbon lug / shark fin lug R521's are fking awesome watches!