Even though a Ferlach gun may bear no maker's name, or may have only the name of a retailer, the first two digits of the serial number signify the actual maker of the gun.
| 20.xxxx | Stefan Dusel |
| 25.xxxx | Martin Kruschitz |
| 27.xxxx | Simon Kalishnik |
| 28.xxxx | Peter Mischitz |
| 29.xxxx | Josef Mischitz |
| 30.xxxx | Josef Orasche |
| 31.xxxx | Michael Pegam |
| 32.xxxx | Anton Sodia |
| 43.xxxx | Johann Sigott |
| 44.xxxx | Walter Gratzer |
| 45.xxxx | Erich Achatz |
| 46.xxxx | Josef Schonlieb |
| 47.xxxx | Lorenz Schaschl |
| 48.xxxx | Josef Fanzoj |
| 49.xxxx | Franz Rp. Schmeid |
| 50.xxxx | Franz Schmeid |
| 52.xxxx | Valantin Rosenzopf |
In the photo below, 40.3778 refers to Ludwig Borovnik's gun number 3778. The [upside down] number 3361.74 refers to the 3361st gun proofed in Ferlach during 1974.

From around 1980, the Ferlach proofhouse adopted a three-letter date code system where the first letter signifies the month and the second and third letter signify the year, as follows:
| Month Code | Month | Year Code | Year Digit | |
| January | 0 | |||
| February | 1 | |||
| March | 2 | |||
| April | 3 | |||
| May | 4 | |||
| June | 5 | |||
| July | 6 | |||
| August | 7 | |||
| September | 8 | |||
| October | 9 | |||
| November | ||||
| December |
, therefore, signifies April, 1989.
The Hallowell & Co. is for informational purposes only. We do not necessarily offer the items described above for sale. Please click on any of the links below to see what we actually do have available for purchase.
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