| Manufacturer: | E. Howard Watch Co. (Keystone) |
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| Manufacturer Location: | Waltham, Massachusetts |
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| Movement Serial Number: | 1312792 |
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| Grade: | Series 11 |
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| Variation: | Arrow and Star |
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| Model: | E |
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| Estimated Production Year: | 1916 |
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| Run Quantity: | 3,000 |
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| Grade/Model Run: | 5 of 11 |
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| Grade/Model Total Production: | 25,100 |
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| Variant Est. Production: | 13,100 (16S-ME-21J-ONL-A5PTI-ARROW AND STAR) |
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| Size: | 16s |
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| Jewels: | 21j |
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| Movement Configuration: | Openface |
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| Movement Finish: | Nickel |
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| Movement Setting: | Lever |
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| Plate: | Bridge Plate |
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| Hairspring: | Breguet |
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| Adjusted: | Yes |
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| Adjusted to Position: | Yes |
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| Adjusted # of Positions: | 5 |
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| Adjusted to Temperature: | Yes |
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| Adjusted to Isochronism: | Yes |
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| Railroad Grade: | Yes |
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| Railroad Grade Classification: | Class A |