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当前,水波纹销票日戳在邮政业务中应用非常广泛。邮政部门规定:水波纹为五条正弦线,纵向间距为4.5毫米,波长为39毫米。笔者收藏有一组很另类的“陕西西安商函”1号电脑水波纹销票日戳。以所见最早的图1为例:此戳左部圆戳直径24毫米,略小于规定的25毫米;右部五条水波纹纵向间距4毫米;波长则只有34毫米。其最大的不同寻常之处在于:圆戳和水波纹之间不但没有间隔,反而是重叠了4毫米之多,看去好似一位秀发飘逸的姑娘。
At present, water ripples ticketing stamps are widely used in the postal service. Postal requirements: water ripple for the five sine lines, the vertical spacing of 4.5 mm, a wavelength of 39 mm. I have a collection of a very different kind of “Shaanxi Xi’an letter ” 1 computer water ripple ticket stamp. To the earliest seen in Figure 1 as an example: This stamp left circular stamp diameter of 24 mm, slightly less than the required 25 mm; right five water ripples longitudinal spacing 4 mm; wavelength is only 34 mm. The biggest difference is that: not only there is no interval between the circular mark and water ripples, but overlap as much as 4 millimeters, looks like a hair-flowing girl.