Tom, I noticed the valves on the 123R and the R-8 Hunter are identical. My R-8 is about the same age as my older model Svea 123 (not R). It appears they simply started putting the R-8 self cleaning valves on the 123's and called them "123R's".
Interestingly, "R" -8 and 123 "R" both have self cleaning valves. The only difference I can see in the plumbing is that the R-8 feeds from the side the the Svea 123R from the bottom. Maybe the Swedish word for "self cleaning" begins with "R". <img src="/forums/images/graemlins/grin.gif" alt="" />

What's really slick is that if you take one of the valves apart, the only part that is "consumable" is a carbon valve packing (which is probably a life time part if you leave it alone...I didn't). Everything else is made for cleaning and reassembly. Nothing to wear out....and the packing is good for decades of re-tightening. I replaced all of mine because it was cheap. The filler cap gaskets too. No 'o' rings anywhere.

Tom, reading the review of your link, I'd say folks like their Sveas! I understand. <img src="/forums/images/graemlins/cool.gif" alt="" />