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All ‘Made in Germany’ Rollei 35 camera’s have sequential serial numbers from the start of production in 1966. Most ‘Made by Rollei Singapore’ Rollei 35 camera’s also have sequential serial numbers. In the late 1970s a small number of Rollei 35 camera’s were produced without serial numbers. From 1979 beginning with the Rollei 35 TE and SE coded serial numbers were used.

Rollei 35 TE and Rollei 35 SE

Coded serial numbers of 9 digits are used for Rollei 35, Rolleiflex SL 66 and Rolleiflex 6000 System. Take 004230028 for instance. The first digit plus "5" (the key) represents the year of manufacture, in this example 0 + 5 = 5. One has to guess the decade and the century! Knowing that this number belongs to an SL 66 E manufactured between 1982 and 1986, the year of production is 1985.

The digits placed in the second and third place, (in our example "0" and "4") are for factory internal use and represent the engineering level. They are called the Index.

The digits in 4th and 5th place minus "20" give the calendar week in the year of production. In our example the digits 4 and 5 are "23". 23 minus 20 is 3, so the camera was manufactured in the third week of 1985.

The digits 6 to 9 stand for the sequential number of a camera built in that week. In our example "0028" means the camera has the number 28 manufactured in the third week of 1985 with an engineering level of 04.