1. Observe the pen body: The classic Altman gel pen usually has a blue or black pen body with white or red words and patterns on it. The optimized version and the upgraded version may have different colors and designs.
2. Observe the nib: Different versions of Altman gel pens may have different nib. For example, the classic version of the nib is more rounded, while the upgraded version is more slender.
3. Check the packaging box: The version information is usually marked on the packaging box of Altman gel pen, and the version of the pen can be determined by checking the packaging box.
It should be noted that some Altman gel pens may be counterfeit products, and the appearance and packaging are very similar to those of official products, but the quality may be different. Therefore, when buying Altman gel pens, it is recommended to choose formal channels to avoid being deceived.
In a word, the version of Altman gel pen can be determined more accurately by observing the pen body, nib and packaging box.