The Parker “51” commonly referred to as a “First Year” pen is really a pen from late 1940 through 1941. They can be easily distinguished from later production by several unique characteristics.

The definitive site on the Parker 51 Fountain Pen. Information on history and its many varieties. Buy, Sell and Trade

The colors below represent a close approximation of the actual pen colors. It must be kept in mind that plastic colors were mixed in different batches as production warranted and thus, some degree of variation in shades is to be expected. This is especially true in the Vacumatic “51” colors, such as the grays and cordovans.

Parker 51 pens retain all the hallmarks that made them one of Parker's most popular pens of the 20th century. Its streamlined silhouette and distinctive hooded nib are ever present and, with its cap off, the Parker 51 still resembles the sleek smooth curves of an airplane fuselage.

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Area 51 (also known as “Groom Lake,” “Paradise Ranch,” and several other names) was a secret testing site for CIA’s highly classified U-2 and A-12 OXCART reconnaissance aircraft programs, as well as a training site for the pilots. The CIA, U.S. Air Force, and defense contractor Lockheed Martin worked together at Area 51, which is ...

2015年11月23日 · The Parker 51 have many colors, but not all are equally valuable. What they are the most valuable and least valuable? Is that the more valuable the Plum but what about the others? For example, what it is more valuable the Nassau Green or Green Forest? I want us to do a scale of all colors to leav...

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2009年7月12日 · Hidden within a ring of mountains deep within the high desert is Area 51, a secretive military installation that exists as part of the Nellis Military Operations Area. It has served as a military...

2023年8月26日 · 在 rgba(51, 51, 51, 1) 中， (51, 51, 51) 表示的是RGB值，即红色、绿色和蓝色的数值，而 1 表示的是透明度。 我们可以使用正则表达式提取出RGB值和透明度，并将其转换为整数或浮点数。 red = int(match.group(1)) . green = int(match.group(2)) . blue = int(match.group(3)) . alpha = float(match.group(4)) print(f'Red: {red}, Green: {green}, Blue: {blue}, Alpha: {alpha}') 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 输出结果为： 1.