This is a GRS Style-G signal (upper arm).

With a GRS Style-D signal (lower arm)
added to display Approach Medium.

They are both from the Reading Co.
The G was from Lebanon Valley Junction
22 Signal (at Bob White) - it was the
top arm on the bracket mast.

The D was from the V12 automatic on the
Lebanon Valley line - it was the bottom
arm, under a single Style-G. It never
had a background installed on it.