Answer:
I recently purchased a World Time model 612-371 in working order and excellent condition at an antique mall for $140. I would like to know if parts are available. That model # does not register with the Howard Miller Co, but I have emailed them.
You might be able to locate additional information via the following website:
http://lawsonshomefurnishings.com/showcaselist.php?item_id=771083&page=5&list_page=1&pagesize=12&columns=3&query_style=showcaselist&type_id=778