Suggestion: For those looking to improve the appearance of PRR O scale steam locomotives (brass or diecast) one of the easiest upgrades to consider is replacing the bell with one that follows PRR practice. Fortunately the PRR interchangeably used the same bell on many classes of power, including class C, E6, G5, H8/9/10, I, K, L, M locomotives, For these classes I recommend PSC part 4201 PSC PRR bell. For classes A and B switchers Class A and B switchers consider PSC part 40114.