I really don't know much about maintaining leather watch straps Ron, but
when I looked around there were some hopefully helpful steps you could
maybe follow over at overstock.com. Everything from how to clean, to
how to preserve, and condition leather straps looks like it is covered !
Not sure if all of these steps are alright to follow with the more high
quality straps like Brian's, but it's pretty interesting. I hope this can
help you, or anyone else out as well sir.
Here is the link..
http://www.overstock.com/guides/how-to-clean-a-leather-watch-strap____________________________________