Atlantic Coast Line GP7 Question

Found this by Warren Calloway thru Google:

Replacement of the single blat horns happened rather quickly. I have photos
made in 1951 and 1952 that have five chime M-5s mounted on the side ot the
short hood where the single bell horns were originally mounted. ACL later
moved them to the top of the short hood roof.

I have a Mac Connery photo of 117 with the 5-chimes on the roof top, made in
Nov. 1951, but other units have them on the sides in 1952. Most by 1955-1956
seem to have them on top of the hood. The bells seem to have moved to the
top of the short in the mid 1950s. Have aeveral photos made in 1956 that
have these roof top bell. Most earlier ones do not have the bell on top.

Warren

From here:

http://www.hosam.com/roads/acl.html#horn

Also, look at Jim Six's articles:

http://magazine.trainlife.com/...17/08/mrr_199502.pdf

http://magazine.trainlife.com/...17/08/mrr_199811.pdf