Model E Organs that somehow retained both Hammond and B&H serial plates. There is also the occasional Model K or KE that carry both plates (more details on Model K’s below). This replacement of the original plates, makes dating using Hammond serial numbers impossible. I suspect the change to B&H plates happened sometime in late 1936 or early. The Hammond organ was an invention that effectively saved Laurens Hammond's clock company in the wake of the Great Depression of 1929. Originally meant for h. In Jan 1955, B3 and C3 serial numbers started at 56000 (in the US). They ran consecutivly to around 103000 in 1968, when Hammond changed to a different system. (3) In 1969, Hammond used a letter prefix followed by a number inclusive of all organs; A for '69, B for '70 etc. (3) Organs manufactured outside the USA may not follow this, however. Each piano is manufactured with a unique serial number that is recorded for future reference of not only when it was made but also where. Discover your Piano’s Age and Country Of Origin with our 5 Star Accuracy Guide to ensure the quality and reliability of each result. Hammond Model A-3 Heritage System. So named because it looks very much like Laurens Hammond's first organ, the Model A, the Model A-3 is ideal for installation in a church or nightclub, or for any application where the classic sound and appearance of a B-series Hammond is desired. Service manual for earlier models of the Hammond Chord organ, which was introduced circa 1952. Covers models S, S-1, and S-4.

Type: Hammond A-102 (A-100 Series). US Model (117V).

Uses a converter to get from 220V / 50 Hz to the required 117V / 60 Hz.

Likely built in 1963. I figured this out using the information available on The Hammond/Leslie Age Determination Listavailable at Tonewheel General

• Fluted vibrato knob – 1962 and older
• Small Hammond script (very much faded) – 1935 – 1965
• Pilot lamp by the start switches – 1961 and later
• AO-28 transformer color black – from mid 1962 (silver up to mid-1962)
• Non-engraved drawbars. Engraved drawbars are used on organs built from 1969

The serial number, 22535, slots in between two other organs on the tonewheel general list that were both identified as 1963 production units.

Speaker serial AO-23232-0 18658 285315 shows a ‚3‘ for the last digit of the year. They are Rola speakers, produced in the 15^th week of 1963.

The coding scheme for the speakers is XXXYWW where XXX is the company EIA code (Jensen = 220, Rola = 285, Heppner = 575), Y is the last digit of the production year, and WW is the production week. 285315 would be a Rola speaker made in the 15th week of 19×3 (you have to figure out which decade using other information).

Hammond used Heppner, Rola, Jensen, and Magnavox alnico speakers as tuned pairs. One speaker has a ribbed cone and is voiced for the low end of the organ’s tone spectrum and the other one has a smooth cone and carries the mid tones.

Color: Dark Cherry.Billabong font download for android.

Hammond Organ Serial Numbers Lookup

As far as I can tell everything is original, with basic maintenance done, like replacing the original power cord, and the addition of a Leslie kit (6122 with line out written on the added panel with the line-out and 6-pin Leslie 122 connector, labeled as ‘Leslie 428-13 Tremolo Control Terminal Box’, which is mounted inside the organ), half-moon switch (Chorale / Tremolo) and a switch to toggle between the internal speakers or the Leslie, or both. The Leslie socket had been rewired to accept a 220V power connection to power a Leslie set up to European specifications.

Hammond Organ Models From 1970s

Here’s some more pictures from a few years back that was used in an advertisement to sell the organ locally in 2015.