Ferwerd, Hervormde kerk

1635?: Organ by Antonie Verbeeck?

1704/05?: New organ by Arp Schnitger with 26 registers in Hoofdwerk, Rugpositief and Pedaal. The old organ has been sold to Jirnsum (Irnsum).

1718: Repairs by Johan Radeker.

1761: Repairs by A.A. Hinsz.

Disposition as described by Hess in 1774:

Hoofdwerk   Bovenwerk   Pedaal  
Praestant 8' Quintadeen 8' Bourdon 16'
Holpijp 8' Praestant 4' Octaav 8'
Octaav 4' Fluit 4' Octaav 4'
Spitsfluit 4' Octaav 2' Nachthoorn 2'
Quint 2 2/3' Sesquialtra II Mixtuur IV-VI
Octaav 2' Scharp IV Bazuin 16'
Sexquialtra II Dulciaan 8' Trompet 8'
Mixtuur IV-VI     Cornet 2'
Cimbel III        
Trompet 8'        
Vox Humana 8'        

1789: Repairs by A. van Gruisen.

1872: Almost new organ by Adema out of Leeuwarden with 27 registers on hoofdwerk, bovenwerk and pedaal.  (01)

1939: Instrument changed by H. Spanjaard from Amsterdam. New case of Adema from the Fries Museum. This case was from the organ of the Dominicuskerk in Leeuwarden.

Source: https://commons.wikimedia.org/wiki/File:Interieur,_aanzicht_orgel,_orgelnummer_201_-_Ferwert_-_20369301_-_RCE.jpg

1950: Reil from Heerde expands the organ to 3 manuals and 33 registers and fills the rugwerk with pipework..

1982/'83: Rebuild and restoration of the instrument by Verschueren in Heythuysen.

Specification after the rebuild by Verschueren:
(s) Schnitger 1704
(s*) Partly by Schnitger 1704

Hoofdwerk (I) C - f3
Prestant 8'
Cornet 5 sterk discant
Bourdon 16'
Baarpijp 8' (s)
Octaaf 4'
Holpijp 8' (s*)
Fluit 4'
Quint 3' (s)
Octaaf 2' (s)
Mixtuur 4-5-6 sterk
Trompet 8'
Clairon 4'		 Rugwerk (II), C - f3
Prestant 4'
Fluit Travers 8' discant
Roerfluit 8'
Fluit 4'
Quint 3'
Octaaf 2'
Terts 1 3/5'
Mixtuur 3 sterk
Dulciaan 8'		 Onderpositief (III) C - f3
Viola 8'
Holpijp 8'
Fluit 4'
Viola 4'
Gemshoorn 2'
Sexquialter 2 sterk
Fagot 8'		 Pedaal C - d1
Subbas 16'
Octaaf 8' (s)
Octaaf 4' (s)
Fluit 2'
Bazuin 16'
Trompet 8'

Speelhulpen :
-Tremulant op RW
 Koppels:  I + II, I + III,  3 pedaalkoppels

2001: In November 2001 Verschueren Orgelbouw from Heythuysen added the following registers to the Onderpositief (III): Viola 4', Gemshoorn 2', Sesquialter II, Basson Hobo 8'/Fagot 8'.

Notes:
  1. Information from Organum Frisicum