| Counting Dials | ||||||
| Series | Model 15 | Model 16 | Model 21 | 400 Series | 500 Series | 600 Series |
 |
 |
 |
 |
|
 | |
| Package Size | 1" x 1 3/4" Rectangular | 7/8" Diameter | 1 13/16" Diameter | 1" Diameter | 1" Diameter | 1" Diameter |
| Numeric Display | 3 Digit, 4 Digit | Vernier Scale | Vernier Scale | Vernier Scale | Vernier Scale | Uncalibrated |
| Number of Turns | 10 (3 Digit), 100 (4 Digit) |
15 | 15 | 10 | 1 | - |
| Standard Finish | Satin Clear Anodize | Satin/Black Chrome | Satin Chrome | Black/Clear Anodized |
Black/Clear Anodized |
Black/Clear Anodized |
| Graduated Numerals | - | Black/White | Black | White/Black | White/Black | - |
| Window Numeral | White | White on Black | Black | - | - | - |
| Brake Lever | Yes | Yes | Yes | Yes | Yes | Yes |
