| Id Number | 258 |
| Object Title | Weston Sensitrol Relay |
| Manufacturer | M-S-A Co. |
| Date of Object | Unknown |
| Model | 705 |
| Serial Number | 69594 |
| Dimensions | 8.5 x 6.5 cm; 3 3/8'' x 2 1/2'' |
| Material | Metal; Glass |
| Id Number | 259 |
| Object Title | |
| Manufacturer | Keuffel & Esser Co. |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | 11462 |
| Dimensions | 11 x 5 x 2 cm; 4 3/8'' x 2'' x 3/4'' |
| Material | Metal; Plastic |
| Id Number | 260 |
| Object Title | |
| Manufacturer | Unknown |
| Date of Object | 1941? |
| Model | Unknown |
| Serial Number | 1474? |
| Dimensions | 10 x 11.5 cm; 4 x 4 1/2'' |
| Material | Metal; Glass |