I thought I'd post a link to PBS's Antique Roadshow watch videos. I don't think this is all of them. I seem to remember ones that aren't listed. But many of the episodes were made before the internet allowed for this kind of segmentation - so a lot of this has to be done post-publication. Anyway, enjoy! http://www.pbs.org/wgbh/roadshow/category/watches/appraisals/?page=1
Yeah, that's interesting. I thought the appraisals for the 6234 and Explorer II were on the money. The 1675 was way off the mark though.