Quote:
Clearly marked 500 OHMS on each of the two coils.
(Yes, there is continuity between the terminals at 1000 OHMS resistance)
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Looks suspiciously like the spec of a type 59A telephone bell to me with polarised armature. Have you a telephone magneto you could try it on? Or a 25 - 75V a.c. supply at a frequency of either 16 2/3 Hz or 25Hz?