Another GREAT post made by Ostendorf back in the old SCWF, this time modding a 7549 300m tuna into an auto one....
By OSTENDORF
original thread:
http://www.network54.com/Forum/78440/thread/1211462671/1211563510/Andy%27s+Dream+%28Tuna+7549+Hybrid+content%29%26gt%3B%26gt%3B%26gt%3B%26gt%3B Hi,
my UK Friend and fellow Forum Member Andy asked me a few weeks ago,
if I could build him his dream watch, like the one on this pic that he made with photoshop:

It should have a Tuna 7549 case, 6105 bezel, a 21 Jewel 6306 Automatic movement and Bill Yao's MK II dial and hands.
As a big Tuna and MK II fan, I was facinated from this idea and Andy sent me the parts he had already collected:

I started with servicing the 6306A movement from a dresswatch, but the date window was on 3 not on 4, so I had to change the main plate too. I modified a movement holder to make the 6306 fit into the Tuna case:


The first attempts with the MK II dial in the Tuna case were not satisfying,
the original chapter ring did not align withe minute marks on the dial:

so we decided to take a black one. As the original Tuna chapter ring is very rare, I turned one out of a 6309 ring and painted it black:



this looks much better:

and here is the result of Andy's dream and my little work


It's a real tool watch, the dial is deep black, has great lume and time is very visible under every condition.
best regards from Germany
Uwe