"SKILCRAFT and other JWOD products and services meet or exceed all applicable performance standards and specifications. We take pride in our products and work to bring our customers the quality, features and value they expect. Several JWOD products are manufactured with brand name suppliers or partners.
http://www.nib.org/JWOD%20Catalog/main.html"
What are they supposed to say, "Our clocks lose time occasionally."?
You further weaken your argument by asking if, because Skilcraft clocks are made by disabled people, those who bring their accuracy into question are "trying to say that the work of disabled people is substandard".
If Skilcraft clocks ARE so accurate, why do the two that show an earlier time than the official crash time differ from each other by a minute?