| Make |
BRL, (Blundell) England |
| Model |
P15 |
| Notes 1. Rear of slide has two fixed clear plastic "cursors"
to allow use of trigonometrical functions without need to remove slide.
2. Rear is marked "Westinghouse Westalite Rectifiers". This is one of many
examples of rules being used as promotional material. |
Front view
 |
Rear view
 |
Detail - Front view left
 |
Detail - Front view right
 |
Detail -back view left
 |
| Manufacturing date |
<1958 (latest reference in a catalogue in P Hopp) |
| Length |
5" |
| Material |
Plastic (Astralon) |
| Scales |
A [B,C1,C/ S,S&T,T] D |
| Gauge points |
p: 3.14: A,B,C1,C,D
r' : 3438 : C,D
r" : 206255 : C,D
c : 1.13: C,D
c': 3.57: C,D
r11: 6.37:C,D |
| Cursor |
Plastic with metal top and bottom |
| Hair lines |
p/4 |
| Documentation |
None |
| Condition |
Good except for two small marks |