4 Reales Segovia - Carlos II milled

Carlos II, the last Habsburg king of Spain, ruled under severe physical and cognitive limitations that left effective power fragmented among regents and court factions throughout his reign. The Segovia mint was Spain's most technically advanced facility during this period, having introduced water-powered milling equipment from Germany in the 1580s — machinery that gave Segovian milled coinage a consistency the hand-struck cobs from American mints could not match. The 4 Reales denomination served heavily in domestic Castilian commerce precisely because the larger 8 Reales drained almost immediately into international trade.

The 1683–1685 window corresponds to a period of acute monetary stress, when the Crown's chronic debasement of vellón coinage had badly eroded public confidence in Spanish currency.