Mine has a separate, original type, wiper motor on each side, working independently from the one on/off vacuum switch. The replies that I have recieved indicate that this would have been added post-production. Thanks to all those who supplied information.
My 32 5W has dual windshield wipers which appear to be original. Most of the 32's I see online have a single wiper and only occasionally do I see one with dual wipers. The reading and research I have done does not explain whether this was offered as an option or only on certain models or maybe...