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How acquired: | Ebay, nibblenicks73 |
| Comments: | Seller says: "It seems that this bulb was made for commercial service because the bottom of the brass base has the months abbreviation printed on it ( shown in pict.#4 ) JFMAMJJASOND along with #s,7890. My best guess about this is the installer of the bulb could mark it when it was installed to see how long it lasted when it blew out." |
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