The Signo 307 is the follow-up model to Uni-ball’s classic Signo 207. The 307 is a newer models, not a replacement or upgrade to the 207 though — while the 307 has a newer design and updated styling it has a number of cost-cutting measures that make it in some ways a step back from the 207.
Uni-ball Signo 307 Gel Pen Information
| Street Price | Check Price |
| Manufacturer | Uni |
| Pen Type | Rollerball / Gel |
| Rating | |
| Barrel Color | White, Purple, Black, Pink, Black, Light Blue, Red |
| Barrel Material | Plastic |
| Body Diameter (mm) | 11.4 mm |
| Grip Color | Purple, Gray, Black, |
| Grip Material | Rubber |
| Grip Diameter (mm) | 11.5 mm |
| Country of Origin | Japan |
| MSRP | $2 |
| Still Sold | Yes |
| Release Year | 2017 |
| Similar To | |
| Refills | |
| Capped? Retractable? | Retractable - Top Button |
| Clip? | Plastic |
| Length Capped / Retracted (cm) | 14.2 |
| Weight (g) | 10 grams |
| Refillable | Yes |
| Ink Color Shipped | Red, Blue, Black |