For a variety of reasons, mostly due to lockdown, I've been wearing my automatics far less frequently. I decided that this year would mostly be a year of quartz, particularly my recently acquired Seiko Arnie. This watch does just about everything I need and wears very comfortably for a larger watch.
In January, I noticed it kept really excellent time, even for a quartz, but decided that empirical evidence was required. I decided to conduct time trials in February, for it and some other commonly used quartz movements.
I pitted the Seiko's H851against the 3229 module in my G-Shock DW-5600-E and the E168 in my Citizen BN-0151 diver.
I set all three to atomic time on the 1st of February and here we are 28 days later. The results are in.
They all share the same specification of +/-15 seconds a month, within comfortable temperatures.
The Citizen was +6, the Seiko +4 and the G-Shock +3 after four weeks, which translates to annual figures of:
Citizen +78s
Seiko +52s
G-Shock +39
So not quite in the HAQ range of Grand Seikos or others, but certainly good enough for everyday use, and all three are great watches. But I do like the idea of the cheapest watch being the most accurate.