Starting last year I added some small sirens to my collection. Here's the small but growing "hoard":
L-110: runs, but has an extremely noisy bearing
Sterling F326: Haven't run it yet, stiff when hand spun, rotor has a very sharp burr
A-5 (yes, A-5): 5 port rotor, needs a plug wired (I'll take care of that tomorrow)
Benjamin 8195 (Older A relabel): screams like a Q
B9: got it last week, haven't run it yet (will do that tomorrow)
A (current style): Got it a few days after the B9, haven't run it yet (will do that tomorrow), I may wire in a longer plug