CAPS,
LAMP,
Nos.
1,
2,
69,
70,
71
and
72
All
these
lamp
caps
have
a
stock
description
made
up
from
two
numbers
and
a
letter.
A
hyphen
separates
the
first
and
second
number.
The
first
number
indicates
the
size
or
type
of
cap.
The
second
number
indicates
the
marking
(if
any)
on
the
lens
-see
"Code
No."
on
Drawing
SD
6.
The
letter
indicates
the
colour
of
the
lens
and
(when
required)
the
colour
of
the
marking -
see
Table
1.
As
examples,
the
description
of
a
Cap
Lamp
No.
1
having
a
green
lens
without
an engraved
marking
is
No.
1 -1B
and
that
of
a
Cap
Lamp
No.
2
having
a
green
lens
engraved "J"
filled
white
is
No.
2 -5B.
Colours
|
Code
Letter |
Colour
of
glass
lens |
Finish
of
glass
lens |
Colour
of
engraving filling |
| A |
Opal |
Polished
from
mould |
Black |
| B |
Green |
Matt
front
and
back |
White |
| C |
Red |
Matt
front
and
back |
White |
| F |
Amber |
Matt
front
and
back |
White |
| D |
No Glass Lens |
Covered by a mask |
- |
| E |
Opal |
Polished
from
mould |
- |
| G |
Clear |
Polished
from
mould |
- |
| H |
Red |
Polished
from
mould |
- |
