I've created a new 'set' on my Bovina (NY) Flickr page called 'Bovina (NY) Postcards.' It's 24 postcard views of Bovina that I and others have scanned over the years - mainly Harlo Tim Bray and the late Alan Davidson. Check these out at http://www.flickr.com/photos/30793716@N06/sets/72157623971982414/. Some of them are numbered, but the numbering is not consistent - this could mean there were several different sets - and the sets may not have been just Bovina views.
Your comments are welcome, especially if you can help clarify where some of the images were taken. And if you have Bovina postcards views that are not included here, please let me know so I can arrange to get a scan of it.