Acme Metal Thunderer Whistles

The original police whiste, with a distinctive high pitched tone.
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These whistles by Acme are described as follows:-

No 58. Biggest (2.25" or 5.7cm) Strongest, Tough Industrial Grade, Solid Brass Pea Whistle.

No 58.5 Big (2 3/8" or 6cm) Solid Brass Pea Whistle, Tapered Mouthpiece.

No 59.5 Medium size (2.25" or 5.6cm) Solid Brass, Silvery Finish, Pea Whistle. Tapered Mouthpiece.

No 60.5 Small, Solid Brass, Silvery Finish Pea whistle. Tapered Mouthpiece

No 63 European style, medium size (2" or 5cm) Solid brass pea whistle - Exceptionally Small.

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