1815 Walter Lange WG - but stopped "speaking to me" after purchase. So I sold it unworn. Sometimes it happens. I wondered why, and concluded that the dial had one less level on Walter Lange. Strange, but it seems that it was the reason. So, I looked for 1815 U/D Platinum which is similar in design but does have one more level in the dial which I really liked. I couldn't find it anywhere. So, I got "Blue dial" WG version (this was also NOS) as an "interim" or "substitute" until the platinum white dial pops up in the used market. BUT, who knows, I located a NEW 1815 U/D Platinum - in Japan where I am now and have picked up. Ah! Nice!. Sorry, Steve, I didn't answer your question but just wanted to share why I did NOT hold onto Walter Lange, and sorry if I intrude your post, Oliver.
Ken