If they were really married or baptised in Muttenz, you should be able to find them in the church records of Muttenz, which are available for a small processing fee through your local LDS Family History Center. The records go all the way back to 1624. They appear to have been microfilmed twice, once in 1948 and again in 1966. The more recent filming is likely to be of better quality, otherwise they would not have bothered!
John McCoy
(
RealMac@aol.com)
