| Flower bulb forcing disk calculator | |
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Front |
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Sleeve |
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| Length | NR |
| Number of scales | NR |
| Country of origin | Netherlands |
| Country of manufacturing | |
| Year of manufacturing | |
| Status of the slide rule | Mint |
| Material of the slide rule | Plastic |
| Type of cursor | NR |
| Status of the box | Mint, vinyl. |
| Status of the manual | Mint. Included in the inside of the sleeve. |
| Collection number | 230 |
| Further comments | A very specialised calculator disk to calculate the timing for the forcing of flower bulbs. |
