Just acquired Dahon serial #D89123515
it is labeled Boardwalk, is forest green color, has Shimano branded 7 speed rear derailleur, cassette has 28T - h, and handlebars do not adjust for height.
Does anyone know the manufacture year, and model year?
Thanks

Best bet is to contact Dahon:

https://usa.dahon.com/pages/contact-us

The Boardwalk is Dahon's longest-running model. Debuting in 2000, it's still in production. It has received spec upgrades over the years (notably moving from hi-ten steel to chromoly) and been supplied as single-speed, derailleur geared and with hub gears. It has quite a following in some parts of the world with model-exclusive clubs and rallies.

Boardwalk meet-up in the Philippines


Boardwalk owners on tour in Malaysia

I believe yours could be a 2008 model. Google 2008 Dahon Boardwalk and see if they match.

Forest green is a great colour! My 2014 Boardwalk is that too.

Boardwalks are a good riding bike. I have 2 that were 6 speeds and have been updated to 7 speed when they were overhauled. One is a 2000 and the other is a 2001. Roger