Rolleiflex White face

The "White Face" cameras were a special issue camera.
There are only 5 models in total:

1. The Rolleiflex T, 
2. The Rolleicord Vb Type 3
3. Type 3, Rolleiflex 3.5F Type 5. 
4. Tele-Rolleiflex. 
5. The Rolleiflex 2.8F Type 4. 

1. The Classic Rolleiflex T Type 4

"White Face" K8T3

Production Serial Numbers: 2.314.000-2.320.298.

Camera # T2317719.

Lens: f3.5 Zeiss Tessar # 11 856693.

Shutter: Deckel Synchro-Compur X 1-1/500 & B.

Filter Size: Bayonet .

Special face plate with Rollei-Werke Franke & Heideke followed by T and serial number underneath takig lens.

Camera had thicker black leather with large grain. From serial number 2.315.800, this camera was available with a Schneider Xenar lens. 

2. The Classic Rolleicord Vb Type 3. "White Face" K3Fb
Production Serial Numbers: 2.666.000-2.677.498.
Camera # Vb 2675054.
Lens: f3.5 Schneider Xenar # 12 112 538.
Shutter: Deckel Synchro-Compur 1-1/500 & B.
Filter Size: Bayonet 1.
This was a special edition camera. A new front lens panel was produced, which was nicknames "White Face." It had the new company name of "Rollei-Werke Franke & Heidecke" below the taking lens with the letters Vb and the camera serial number.  Only 11,498 were produced. Camera had a new type of course grained black leather. 12-16-24 capability on 120 film with the use of masks.
This camera does NOT take 220 film.

3. The Classic Rolleiflex 3.5F Type 5
"White Face" K4F/2
Production Serial Numbers: 2.845.000-2.857.149 and
3.555.000-3.559.999.
Camera # 3.5F 2856520.
Lens: f3.5 Schneider Xenotar # 12449750.
Shutter: Deckel ynchro-Compur MXV. 1-1/500 & B.
Filter Size: Bayonet 2.
This camera has the 120/220 option which permits 24 exposures on 120 film.  It also has the built-in meter. Camera number is located beneath taking lens. and has the company name, "Rollei-Werke Franke & Heideke"
There are six variations of this camera including lens change: Planar or Xenotar, and the 120/200 option plus name change.

5. The Classic Rolleiflex 2.8F Type 2
"White Face" K7F2 with 12/24
Production Serial Numbers: 2.451.851-2.479.999.
Camera # 2.8f 2,476.704
Lens: Carl Zeiss Planar 
Shutter: Synchro-Compur MXV. 1-1/500 & B.
Filter Size: Bayonet 3.
This model was produced with the Planar lens.
Black leather with coarse grain. Built-in exposure meter.  Camera available with or without 120/220 option.  Camera serial number is located below the taking lens and is preceded by the letters 2.8F . The company name, Rollei-Werke Franke & Heidek is also below the taking lens.

5. The Classic Rolleiflex 2.8F Type 4
"White Face" K7F4
Production Serial Numbers: 2.900.000-2.959.999.
Camera # 2.8f 2952526.
Lens: f2.8 Schneider Xenotar # 12 109506.
Shutter: Deckel Synchro-Compur MXV. 1-1/500 & B.
Filter Size: Bayonet 3.
This model, in the 2,9XXX range, was only available with the Xenotar lens.  Black leather with coarse grain. Built-in exposure meter.  Camera available with or without 120/220 option.  Camea serial number is located below the taking lens and is preceded by the letters 2.8F . The company name, Rollei-Werke Franke & Heidek is also below the taking lens.
This camera was also made in the 2,4XXX range and had the Planar lens witn or without the 12/24 option.

Source: http://johnsrolleionlypage.homestead.com/whitefacecollection.html