I'm a little bit surprised. The dial looks - according to MWO - like a B3-dial which was used with 145-012 but it has a printed logo instead the metal logo. As far as I know the dials with step and printed logos had always short indeces or am I wrong? The dial seems not to be relumed.
I donot think that It is a service dial. I believe it is the genuine dial of transition 145.012.68 which is a rare reference. It was made in last few months of year 1968 (November and December only; The true transition period from 321 to 861). There are mixed and confused information from 145.012.67, early 145.012.68 and 145.022.68 in the blogs when we talk about 145.012.68 in general. In mid 1968 the watch case backs were engraved 145.012 (not with 67 or 68 in end), they had 321 movement, stepped dial, metal applied logo, long hour marker, and people started calling them 145.022.68 just for comfort as the year was 1968 (actually some were the late 145.012.67 productions which reached the market in start to mid of the 1968). The True 145.012.68 are the unicorns. Early version had the fully reference engraved case back (145.012.68). It had a 321 movement. It had the stepped dial with long hour markers and the applied logo, But later (November/December 1968 versions) had the printed logo on a stepped dial and long hour markers (don't confuse it with short hour marker dial of 861 movements which were also made at similar time with reference 145.022.68). Very few people have the last version of 145.012.68 watches with (321 movement, stepped dial, long hour marker, and the "printed" logo) and people confuse them by telling that its a service dial but it is not because the 1st service dials have had shorter hour markers and they were the ones used for 871 movement watches in 1970s as well.
... people confuse them by telling that its a later service dial but it is not because the later...
I guess the Speedmaster gurus will have to chime in on this but I don't think anyone is claiming them to ve "later service dials". There are claims and arguments about it being an "early service dial".