Honeywell BZE6-2RN2 Enclosed Limit Micro Switch.

New open box one of the cover screws is missing looks to be a # 6 screw 1" long.
 
This is surplus to a now closed factory that kept spare parts on the shelf the boxes may show shelf wear and have some dust on them
 
[Please Look at all the pictures they are part of the description]
 
                                                                                                                                     [B1-F1-R4-S1-3]