两支不同年代绿条对笔图,上面的日本OEM 400nn会短一点点的
这里找到OEM 400nn的资料:
MODEL 400NN Merz and Krell
1973 - 1978
This model has the following different features to model 400NN:
1. straight grip(直笔握)
2. no rim between the mechanism and the barrel(尾部活塞桶和笔身的连接处没有多出的边缘)
This model was produced by the manufacturer Merz and Krell by order of Guenther Wagner.