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[1 - 1937]    [2 - 1937]    [3 - 1940]    [4 - 1940]    [5 - 1940]    [6 - 1940]    [7 - 1941]    [8 - 1941]

[9 - 1942]    [10 - 1943]    [11 - 1943]    [12 - 194?]
 

INTRODUCTION

Below are two or three close-up photos of each of my RV 12 P 4000 tubes, showing all their markings. They are listed in chronological order.

If you have such tubes with other types of markings, other WaA stamps, etc. (i.e., not just different date stamps), please feel free to send me photos and info. You can contact me here.
 

The four original Wehrmachtröhre RV 12 P 4000 tubes of my Feld-Hell plus five of my spares
 

Markings:

	Manufacturer: Telefunken
	Date codes: 27/37 and 12. Juli 1937 and 121632
	Eigentum: Wehrmachteigentum
	Waffenamt stamp: 338
	Knob insert: black octagonal Telefunken logo
	Other observation: white plastic disk at top

Markings:

	Manufacturer: Telefunken
	Date codes: 31.37 and 17. Aug. 1937 and 1254
	Eigentum: Wehrmachteigentum
	Waffenamt stamp: 338
	Knob insert: black octagonal Telefunken logo
	Other observation: pointed grid pin

Markings:

	Manufacturer: Valvo
	Date codes: 11/40
	Eigentum: Wehrmachteigentum
	Waffenamt stamp: Wa. A. 745
	Knob insert: black octagonal Telefunken logo
	Other observation: white plastic disk at top

Markings:

	Manufacturer: Valvo
	Date codes: 11/40
	Eigentum: Wehrmacht
	Waffenamt stamp: Wa. A. 745
	Knob insert: black Valvo logo
	Other observation: white plastic disk at top

Markings:

	Manufacturer: Telefunken
	Date codes: 24/40 and 192248
	Eigentum: Eigentum RLM
	Waffenamt stamp: none
	Knob insert: black square Telefunken logo
	Other observations: white plastic disk at top; very unusual that the Eigentum stamp is magenta and that there is no WaA stamp on this tube

Markings:

	Manufacturer: Telefunken
	Date codes: 24/40 and 192413
	Eigentum: Eigentum RLM
	Waffenamt stamp: none
	Knob insert: black square Telefunken logo
	Other observations: white plastic disk at top; very unusual that the Eigentum stamp is magenta and that there is no WaA stamp on this tube

Markings:

	Manufacturer: Valvo
	Date codes: 08/41
	Eigentum: Wehrmachteigentum
	Waffenamt stamp: WaA 745
	Knob insert: black Valvo logo
	Other observations: factory code "H" and "2"; white plastic disk at top

Markings:

	Manufacturer: Valvo
	Date codes: 16/41
	Eigentum: Wehrmacht
	Waffenamt stamp: WaA 745
	Knob insert: black Valvo logo
	Other observations: factory code "H" and "4"; white plastic disk at top

Markings:

	Manufacturer: Valvo
	Date codes: 43/42 and 47/42
	Eigenum: Wehrmachteigentum
	Waffenamt stamp: WaA 745
	Knob insert: dark green Valvo logo
	Other observation: factory code "H"

Markings:

	Manufacturer: TeKaDe
	Date codes: 15.11.43 and 47/43
	Eigentum: Wehrmacht
	Waffenamt stamp: Wa. A. 836
	Knob insert: dark green TeKaDe logo
	Top: dark brown / black disk
	Other observation: none

Markings:

	Manufacturer: Valvo
	Date codes: 11/4 and 13/4 (note: single-digit year-code)
	Eigentum: Wehrmachteigentum
	Waffenamt stamp: WaA 745
	Knob insert: uncolored ( = bakelite) Valvo logo with painted green dot
	Other observation: steel sheet metal perforated sleeve

©2009-2010 F. Dörenberg

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