A Philips' Planisphere star finding chart, the black leatherette frame embossed in gold with hour scales and foliate decoration, rotating chart printed with calendar and zodiac scales, the black star chart with named constellations, the reverse with instructions and star magnitude table - 12½in.diam; and another similar (2)

细节
A Philips' Planisphere star finding chart, the black leatherette frame embossed in gold with hour scales and foliate decoration, rotating chart printed with calendar and zodiac scales, the black star chart with named constellations, the reverse with instructions and star magnitude table - 12½in.diam; and another similar (2)