|
      
Dating of Kern instruments is sometimes difficult because of two mainly
reasons:
- pre 1900, instruments like levels and theodolites did not have serial
numbers
- on drawing sets, they also used old items with old logos in newer sets (I
have a set where they used logos from three periods ...)
So if your instrument has a serial number I might be able to tell you the
approximately production date. pre 1900: no serial number
(first registered serial number is 16615 from Jan.16. 1899)
1910 19500
1920 23500
1930 27500
1940 30500
1950 40000
1960 73000 If
not, you might use the following overview over there company logos to date your
instrument:
(based on my drawing sets and brochures) I divide them mainly in six categories
(all data are approximately since they used different logos in a single set to
use up there stock):
| known as used from |
Logo used on case |
Logo used on instruments |
Logo used on brochures, manuals, price list |
1
1819 - 1885 |
 |
no marking on instruments |
 |
2
1885 - 1914 |
 |
early one without any marking
later ones with the Kern trademark
 |
(1891)
(1897)
(1914)
|
3
1914 - 1926 |
  |
 |
|
4
1926 - 1949 |
 
|
|
 |
5
1950 - 1959 |
 |
 |
 |
6
1959 - 1990 |
 |
|
 |
If you have additional information ore comments, please send them o me by
email.
I will be glad to add them to this site to share them with other collectors. Ore
if you have a set or instrument do date, please send m some pictures. I am
also interested to acquire new sets. So, please let me know if you have a set
ore instrument you do not need anymore
is this a Kern ?
Dividers are marked with a "K"
and the case is marked with "Aarau"
Regarding the shape of the set, could it be a
|
 |
| drawing sets from Aarau, but not from Kern |
|
| Hommel - Esser , Aarau |
 |
Gysi & Co. Aarau
|
 |
| J.Bossart , Suhr-Aarau Suisse |
 |
| |
|
| |
|
| |
|
| 
