A 100mm domed illuminated push button.
''''Note for pop'n music SD cabinets:''''
Some service manuals refer to this part by (likely) outdated part numbers. The current part numbers are listed in the table below:
<table>
<tr><th>Color</th><th>Old Part no.</th> <th>New Part no.</th></tr>
<tr><td>Red</td> <td>OBSA-100UMQ-KN83</td> <td>OBSA-100UMQ-R-194</td></tr>
<tr><td>Green</td> <td>OBSA-100UMQ-KN84</td> <td>OBSA-100UMQ-G-194</td></tr>
<tr><td>White</td> <td>OBSA-100UMQ-KN85</td> <td>OBSA-100UMQ-W-194</td></tr>
<tr><td>Yellow</td> <td>OBSA-100UMQ-KN86</td> <td>OBSA-100UMQ-Y-194</td></tr>
<tr><td>Blue</td> <td>OBSA-100UMQ-KN87</td> <td>OBSA-100UMQ-B-194</td></tr>
</table>