A Chinese cong vase, Republic period (1912-1949), heavily potted after the archaic jade form, the square body rising from a short circular foot to a narrow tapering circular neck, moulded to each corner with bagua (Eight Daoist Trigrams) in two tiers framing in the centre of each side an undulating band, covered overall with a crackled opaque beige glaze, six-character Yongzheng mark to base,28cm high民国 八卦纹琮式瓶 《大清雍正年制》青花楷书款The shoulder with a burst glaze bubble. Minute chips and surface scratches to foot rim.