Single Pin Escapement with Glass Dome

A very rare working upright model of a single pin escapement. Based on Charles Macdowall's 1851 patent and here adapted to a balance wheel with openwork going barrel, the single pin pallet escape wheel engaging a pierced and slotted roller for locking and impulse, with six arm balance and flat spring, on circular wood base with glass dome. Although this form of escapement was attempted years earlier, Charles Macdowall was the first to produce a successful version. Ingenious in its simplicity, it succeeded at reducing friction.