![](http://www.alamy.com/thumbs/6/5209FFC5-F5DA-419E-AE62-032DF42B62B2/2F23YMJ.jpg)
Some lockplates have markings – a small hole or the letters S (spannen or ‘spanned’) and O (ontspannen or ‘not spanned’) – to show whether or not a wheellock was spring loaded. This is a typical feature of Dutch wheellock firearms. There are even two letters S on this pistol’s lockplate. The scrolled S was probably just an ornament.
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Photo credit: © BTEU/RKM / Alamy / Afripics
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