清代光绪年间云南“宝来课银”五両牌坊课税银锭，57.1x37.7x14.7毫米, 重174.7克，中乾AU53，双樑均没有常见的公估验讫打戳，从而推断此枚为光绪十年之前还没有议决云南牌坊锭的标准前所铸，鲜见的类别。China, Qing Dynasty, Yunnan Province, [Zhong Qian AU53] saddle shaped silver 5 tael sycee, 1796-1884, stamped Bao Lai Ke Yin thrice, 57.1x37.7x14.7mm, weighs 174.7g, without the quality inspection stamps on the two columns usually seen on these types, thus very likely an early type before the standardisation of the saddle sycees, rare
