F7B unit paint schemes

Did any of the B&O F7B's retain their original paint scheme but were relettered and numbered with the newer style (yellow block) scheme that was introduced in the early 60s? I recently saw a photo of an A unit done that way and was wondering if any B units got the same treatment. If so what was the unit(s) number and how long did it last in that fashion. Thanks

Here is your typical F7A unit painted in the scheme you're talking about, which was called the "Gothic" scheme, and numbered in the 4### series. This is #4651:



And yes, the F7B units were similarly painted, but they were numbered in the 5### series. Here is #5426:



This scheme lasted pretty much until B&O retired its F7 units, most of which were traded in for GP-35's, 38's, and 40's, in the late 1960's and very early 1970's.

Both images are courtesy of the George Elwood site.