Was just looking through some old Lionel catalogs and noticed that the ZW (250w) firsts shows up in the 1948 book with a mention of the VW (w/out a picture) stating it was identical but with lesser power (150w) available. The 1949 catalog had the same information. Price difference was but $2.50 - $25 vs $22.50.
The VW was not mentioned in the 1950 book.
Was there just one initial run of the 150w VW or was it produced for several years back then.
Are they particularly 'rare' or have collector value in themselves?