I have nice collection of Seamasters and am loving them. I'm also looking at Speedmaster but just don't like manual wind. New models are available with auto movements but are 44.5mm. But it's kind of not the original Speedmaster dimension, hence I was looking for a 42mm Speedmaster with automatic movement. Then today I came across Bullhead and while researching it's Caliber 3113 I found out that Speedmaster Broad Arrow 318.104.22.168.02.001 has the same movement. White dial aside it's 44.5mm!
I then searched for other possible Broad Arrows and came across 3551.50.00 It uses different caliber though, Caliber 3300 but it is automatic and watch is 42mm!
Ia wander if community can suggest any other versions of 42mm automatic Seamasters? Also few words about calibers 3300 and 3113? How good are those? Both Broad Arrow versions are available used only.