The upper section of the long tapering shaft is decorated with a reticulated panel filled with leafy branches, the top of the shaft slightly curved and crowned by a mushroom head centered with an open-worked shou character flanked by two shou roundels.
Note:
For an example in a similar form, see YANG, Zhishui. Zhongguo Gudai Jinyin Shoushi. Beijing: Palace Museum Press, 2014, vol. 2, p 438-439, pl. 5.43. 

簪頂蘑菇頭鏨壽字紋，下鏤空卷草紋，逾20 cm長，形制、紋樣俱與中原不同，見揚之水著《中國古代金銀首飾全三卷》，第438-449頁。