I agree, the yellow gaiwan is not hand painted, but is stamped, stenciled, etc. My uneducated guess is that it's made in 70's. I'm still intrigued by the unglazed tan colored bottom of the plate and the maker stamp.Hmm wrote: Hmm. Perhaps I'm wrong to think this, but my assumption whenever I see a motif overlap another motif, is that it was done later, rather than early 20th. I assume that they were using a stencil and were just haphazardly drawing, spraying, or stamped the glaze on, rather than painstakingly using a brush to apply the glaze. That's just my general assumption. you will notice on the 壽 character, that the red circle is basically printed onto the "vine?" motif. I would think that in earlier periods, someone painting the object wouldn't do that, and would just make the vine a little bit smaller, or place it in a different place, etc. Or simply not paint the red circle right on top of it, but make it look like the "vine" overlapped the circle. Also the vine pattern is a bit too "exactly" repeated, so whoever did it, likely was "assisted"... Something you generally don't get with hand painted objects.
See e.g. http://gotheborg.com/marks/bild/1189_fullsize.jpg
In the 50s and even 60s I think a worker would have paid more attention to details. So I would place it in the last quarter of the 20th century, rather than any earlier.
The others seem handpainted with the smallest gaiwan of the original 3 showing the finest detail.
Was the gotheborg link an example of the overlap you mentioned?