https://upload.wikimedia.org/wikipedia/commons/c/c9/Altair_Computer_Front_Panel.jpg
Altair 8800b front panel (2nd model)
The MITS Altair 8800b was introduced in mid 1976 as the successor to the original Altair 8800 that appeared on the cover of Popular Electronics in January 1975. It had an improved front panel, larger power supply, an 18 slot mother board. The price was $840 for a kit and $1100 for an assembled unit. A typical hobbyist system with 16K of memory, a video display, a cassette tape data storage, and BASIC language software would be around $2000. The BASIC language software was written by Bill Gates, Paul Allen, and Monte Davidoff. Computer displayed by Robert Rosenbloom at the Vintage Computer Festival. This was held at the Computer History Museum in Mountain View, California, November 2007. Photo by Michael Holley, November 2007. Taken with a Canon PowerShot A630 (1/10 second and F/3.2) with existing light.
By Swtpc6800 en:User:Swtpc6800 Michael Holley - Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=3131160

https://upload.wikimedia.org/wikipedia/commons/d/d1/Altair_8800b_Computer.jpg
By Swtpc6800 en:User:Swtpc6800 Michael Holley - Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=3132056