Hi Mark,
I planned to trade the 1815 and add a lot of money for the 5205. But I am not sure enough to go for the 5205. I like the black dial but I deem the readability not good for me.
Today I have 6: PP5296, PP5712, LS1815, AP15300, ROLEX Sub C, Dayto Zenith. That is enough. I enjoy my new 5712 and will see for new projects later.
I love the 1815, the perfection of the movement. Feel the case a little bit large at the beginning but now I like it.
Best regards, Henri