High grade Allan Robertson feather golf ball that was once part of the famed Jaime Ortiz-Patino collection and displayed at Valderrama Golf Club in Spain. Surely one of the finer featheries we've ever come across - bearing the mark of Allan Roberton, who was perhaps the finest golf ball maker (and golfer) of his era. The ball dates to approximately 1830s to 1840s. It contains a high grade "ALLAN" stamp, which is next to a near perfect "28" to signify the weight of the ball.