Vector Scale, Gudermanian Scale and Log Log Scales"
| Manufacturer | Sun-Hemmi |
| Model | 153 |
| Serial No. | none |
| Date Code | none |
| Scale length | 25 cm |
| Overall length | 32.0 cm |
| Width | 4.0 cm |
| Body/Slide materials | Plastic on Bamboo |
| Post materials | Metal |
| Cursor materials | Metal / Glass |
| Scales | L K A [B CI C] D T Gθ θ Rθ P [Q Q' C] LL3 LL2 LL1 |
| Accessories | Black cardboard case; repaired with electrical tape |
| Notes | Patent covering special scales Hemmi manual fragment covering trig and hyperbolic functions JOS article about Hemmi trig and hyperbolic scales |
| Tag No. | SH-153 |