|
A W Faber 339
(25cm Scale, Mannheim, School use)
Examples: 1928, 1935
Version Comparison
Mid and late versions of the model fully detailed below, differences summarised as follows:
Click on a column heading to jump down to version images and detailed description.
|
|
1928 |
1935 |
|
Front Length:
|
280mm
|
295mm
|
|
Height:
|
6mm
|
9mm
|
|
Scale Labels:
|
-
|
Left & Right
|
|
p Gauge Mark:
|
A & B
|
A, B, C & D
|
|
Cm Ruler:
|
-
|
Back, upper edge
|
|
Inch Ruler:
|
-
|
Back, lower edge
|
|
Stock Form:
|
Single piece
|
2-part
|
|
Stock Flex:
|
-
|
Steel sprung
|
|
Celluliod Facing:
|
Front only, no pins
|
Front, back, back of slide & well, secured with wooden pins.
|
|
Cursor Grooves:
|
Single
|
Double
|
|
Cursor:
|
Plastic, single piece
|
Free view
|
|
DRGM Labelling:
|
-
|
In well
|
|
Origin Labelling:
|
On back
|
In well
|
Click on the images for enlargements.
A W Faber 339 (1928) |
|
|
Summary
|
|
System:
|
Mannheim
|
|
Specialization:
|
School use
|
|
Type:
|
Closed frame
|
|
Material:
|
Maple
|
|
Facings:
|
Celluliod
|
|
Scale Length:
|
25cm
|
No of Scales:
|
4
|
|
Front Length:
|
280mm
|
Front Width:
|
27.5mm
|
|
Language:
|
English
|
Origin:
|
Bavaria
|
|
Date:
|
1928, October
|
|
Features/Notes:
|
-
|
|
Scales (colours as shown)
|
|
Front:
|
A [ B, C ] D
|
Back:
|
-
|
|
Labels Left:
|
-
|
Labels Left:
|
-
|
|
Labels Right:
|
-
|
Labels Right:
|
-
|
|
Style:
|
Normal
|
Typeface:
|
Serif
|
|
Extensions:
|
-
|
Decimals:
|
As units between 1 & 2 on C & D
|
|
Gauge Marks:
|
p (3.14) on A & B
M (1/p=0.318) on A & B
C (1.13) on C & D
C1 (3.57) on C & D
|
Rulers:
|
-
|
|
Features/Notes:
|
-
|
|
Construction
|
|
Stock:
|
Single piece solid stock.
Braced with longitudinal metal strips (DRP 206428, 1908).
Square top and bottom edges.
High cursor grooves both cut parallel to front face.
Flat back.
Front celluloid faced, secured with wooden pins (DRGM 371190, 1908).
Length x Width x Height (mm) - 380 x 27.5 x 6
|
|
Slide:
|
Single sided
Braced with longitudinal metal strips (DRP 206428, 1908)
Celluliod faced on front only, secured with wooden pins (DRGM 371190, 1908)
Front face width (mm) - 12
|
Cursor:
|
Single piece moulded plastic.
Left end riveted steel spring on top runner.
Single central full length hairline.
Width x Height (mm) - 29 x 30
|
|
Printing (colours as shown)
|
|
Stock:
|
"339" + scales logo + "A.W. FABER" in the centre of the well, sans-serif.
"MADE IN BAVARIA." in the centre of back, sans serif.
|
|
Slide:
|
-
|
|
Cursor:
|
-
|
|
Labels:
|
None
|
|
Instructions
|
|
None
|
|
Box (colours as shown)
|
|
Style:
|
Not present
|
L x W x D mm:
|
-
|
|
Material:
|
-
|
Colour:
|
-
|
|
Construction:
|
-
|
|
Printing:
|
-
|
|
Labels:
|
-
|
|
Detail Images
|
|
Click on the images for enlargements.
Click on the images for enlargements.
Click on the images for enlargements.
|
Click on the images for enlargements.
A W Faber 339 (1935) |
|
|
Summary
|
|
System:
|
Mannheim
|
|
Specialization:
|
School use
|
|
Type:
|
Closed frame
|
|
Material:
|
Maple
|
|
Facings:
|
Celluliod
|
|
Scale Length:
|
25cm
|
No of Scales:
|
4
|
|
Front Length:
|
295mm
|
Front Width:
|
27.5mm
|
|
Language:
|
English
|
Origin:
|
Bavaria
|
|
Date:
|
1935, April
|
|
Features/Notes:
|
-
|
|
Scales (colours as shown)
|
|
Front:
|
A [ B, C ] D
|
Back:
|
-
|
|
Labels Left:
|
All, as scales
|
Labels Left:
|
-
|
|
Labels Right:
|
All, as scales
|
Labels Right:
|
-
|
|
Style:
|
Normal
|
Typeface:
|
Serif
|
|
Extensions:
|
-
|
Decimals:
|
As units between 1 & 2 on C & D
|
|
Gauge Marks:
|
p (3.14) on A, B, C & D
M (1/p=0.318) on A & B
C (1.13) on C
C1 (3.57) on C
|
Rulers:
|
cm on back, upper edge
inch on back, lower edge
|
|
Features/Notes:
|
-
|
|
Construction
|
|
Stock:
|
2 part split stock joined with steel springs (DRGM 522689, 1912; DRGM 452965, 1911).
Braced with longitudinal metal strips (DRP 206428, 1908).
Square top and bottom edges.
Double cursor grooves enabling cursor to be turned around and used on the back.
Flat back.
Front, back and well celluloid faced.
Length x Width x Height (mm) - 295 x 27.5 x 9
|
|
Slide:
|
Single sided
Braced with longitudinal metal strips (DRP 206428, 1908)
Celluliod faced on both sides
Front face width (mm) - 12
|
Cursor:
|
Freeview (possibly DRP 465658, 1927), glass pane.
Top and bottom metal runners (plated?).
Left end riveted steel spring on top runner.
Single central full length hairline.
Width x Height (mm) - 29 x 35
|
|
Printing (colours as shown)
|
|
Stock:
|
"339" + scales logo + "A.W. FABER" in centre of well above split, sans-serif.
"D.R.G.M." in the centre of the well below the split, sans-serif.
"MADE IN BAVARIA" stamped in the well, above the split towards the right end , sans-serif.
|
|
Slide:
|
-
|
|
Cursor:
|
"1" and "MADE IN BAVARIA" stamped on the back of the top runner, sans-serif.
|
|
Labels:
|
None
|
|
Instructions
|
|
None
|
|
Box (colours as shown)
|
|
Style:
|
Square
|
L x W x D mm:
|
308 x 45 x 17
|
|
Material:
|
Cardboard
|
Colour:
|
Black
|
|
Construction:
|
2 part, internal sleeve join.
Faced.
|
|
Printing:
|
scales logo + "A.W. FABER'S" and underneath "Calculating Rule for School use" on the front.
Round indentations on the front either side of the opening.
|
|
Labels:
|
"51/39" and underneath in smaller type "MADE IN BAVARIA" on black, on both ends.
Small, third party, red bordered white label on right end of back, with handwriten "7=6".
|
|
Detail Images
|
|
Click on the images for enlargements.
Click on the images for enlargements.
Click on the images for enlargements.
Click on the images for enlargements.
|
|
