Older Jack Russel (type) dog found between Yok andStar Avenue

Who oh who has lost his, her or their dog, or knows this dog? 

This dog  was found trotting on the superhighway between Yok and Star Avenue/Mc Donalds, and has been spotted by 2 more persons in that area, about 2 weeks ago.

He is an Jack Russel (type?) intact male of around 9 years of age.  
For an older dog his teeth are remarkable clean and sparkling white without any plague. And despite he was walking on the street he had no ticks or fleas, and his coat looked dirty, but beautiful dense and shiny. He is friendly towards people and ignores barking and growling dogs at the other side of the fence. He loooovvvvves females in heat, though.  He may be old, but his hormones are similar to that of a teenager. (tomorrow he will be neutered).
He is used to walking on a lead. And when given the chance he is a good climber (over the backseat of the car or fences). 
He is very good at begging for treats. 

On Facebook it has been shared via Santisook (Eng&Thai), some English Chiang Mai pages and only Thai: https://www.facebook.com/banmaasib/posts/1320252868019739?
pnref=story has been shared 160 times. 
Further, I have put up posters at the Animal Hospital and a pet shop behind Big C Extra, Ran Raksath, Rimping and a petshop in Star Avenue, Fah Sai Animal Hospital and Thong Lor. 
Unfortunately, till now we've got only 2 responses of people who have seen him walking.  

Nonetheless, from my observations I have strongly the feeling this dog has or had an owner who very much loves or loved and took good care of him. And that this dog escaped rather than that he was dumped/ abandoned.
Maybe, the owner is not around and/or is not on Facebook.

So, who knows or recognizes this dog? 
If you do, please, PM for details

Thank you.