I have the 1838 and 1848 census for Graubunden on loan, that may show some rough birth dates but not marriage records. After reading your post...and not knowing what dates I was looking for, I looked for Veronica Tester and found one age 5 in 1848, but that is obviously not who you were looking for! I can take a look and see what else I can find next time I am there. Have you considered ordering microfilms of the church records? Those are usually quite informative.