Thank you mod for splitting this into a separated thread so we can have an opportunity to discuss about the space bars.
![Thumbs up! :thumb:](https://cdn.geekhack.org/Smileys/solosmileys/thumbsup.gif)
I think in order to identity the material of the space bar whether it is ABS or PBT, we shouldn't trust the number 1 or number 2 on the bottom because as you can see my comparison, a Cherry PBT space bar can have either 1 or 2.
![GMK/Cherry Spacebar Discussion - Markings? 61901-0](https://geekhack.org/index.php?PHPSESSID=25r5l6lqhsoqihrkt71sd64f04h6782h&action=dlattach;topic=57352.0;attach=61901;image)
![GMK/Cherry Spacebar Discussion - Markings? 61903-1](https://geekhack.org/index.php?PHPSESSID=25r5l6lqhsoqihrkt71sd64f04h6782h&action=dlattach;topic=57352.0;attach=61903;image)
I think the most reliable factors are the outlook, surface, the 4 bottom-corners, colour of plastic, weight and the stiffness of the spacebar.