OK - here's a link to a thread that has an old Waltham WW later on in it. It really appears to be a smaller to midsize PW modified to take a strap:
http://www.mwrforum.net/forums/showthread.php?t=14357&highlight=Waltham
But, even this one doesn't appear to be "top of the line" in movement quality.
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Seiko Matsuda
The Patron Saint of Seiko Collectors