Looks like a 501. If the lantern is turned 180 degrees so the pump is on the right, you should see 501 DITMAR FABRIQUE EN AUTRICHE
The older Ditmar 501s are not marked with the type number. I have 3 Ditmar 501s. 04/3 = April 1933 =not marked 08/7 = August 1937 = marked 12/7 = December 1937 = marked My two Ditmar 503s from 1933 and 1934 are also not marked with the type number. The age of the Ditmar 501 kerosene and Ditmar 503 gasoline can be read on the underside of the tank. Regards Reinhard
@Reinhard I did not know that, thank you for the information. I have two Ditmar 501s and both are marked with the model number. 03/4 = March 1934 (incomplete/not working). 11/8 = November 1938 Henry.
Hey. Has now got Maximen home. The only thing that is on it is what you can see in the picture, and there is no number. There is nothing under the tank either. From this information can one say something about which period the lamp is manufactured. Tom
Hey. I'm not sure it's a No. 506. The carrying handle on my lamp is not attached in the same way as on 506. I am attaching some pictures that might help. Tom
@Reinhard Hi Reinhard Thank you very much for your help which I appreciate, very much Can you tell me how to remove the vapouriser from this lamp, and takes out the control cock, which I assume must be disassembled to remove the vapouriser. Maybe some pictures will be of great help. Sincerely Tom
Maybe the picture helps a little. 1.Push up the preheater cup 2.The upper part of the vaporizer must first be unscrewed.
From my opinion it should be an "older" version of the 501. Surely from the early 1930's. The way the handle is attached, the handwheel, and the lock of the pump stem, as well as the inner hood makes me believe so. However, I'm surprised that there's no stamping on the fount bottom. You're lucky that the glass cylinder and the clay burner are intact. It's hard to come by those parts. Please be careful at removing the packing in the gland of the excenter rod, it can be hard to remove. The last picture from Reinhard shows it clearly.
@Reinhard @WimVe @Martin K. Hey. Thanks for all the information. Now the lamp works. Then it's just fine-tuning. Tom
@WimVe Hi Can a Mica Shade withstand the heat of the lamp gives off. Never seen a pressurelamp with such a lampshade Tom
Mica was the first choice in those days. yes it can and they work excellent. I think that glass was more expensive then mica and since lamps where bought to use, not easily break. On the shelf you can use a marked rare glass globe. Fred Kuntz makes good mica reproductions.
The flame that Wim discovered could have four causes. 1.The burner is demaged or not tightened enough. 2.There is an excess of fuel. The jet hole is too big. 3.Too small mantle. 4.Foreign bodies in the mixing tube. The mica glassses are sufficiently heat-resistant.
Buy two of the largest slices in the hytta shop. 12×17 cm. The high must be adapted to the frame. You need a piece of sheet metal, tin snips, two pliers to bend the sheet metal clips. Gripping pliers are helpful to first secure the mhe mica glass to the frame. Of course, the two halves will overlap twice. But you can hide that behind the struts.
@Reinhard Very informative too. Thank you! Mica can be a bit of a devil to work with but you seem to made down to a "fine art"!
Hey. I have read that Maxim 501 was made for both kerosene and benzin. From the attached pictures of the jet, you can see which fuel it is intended for. A cleaning needle for a regular Primus fits into the jet. Does anyone know where its possibly buy new needle and jet? Thanks Tom.
In the past, I have bought new jet and needle from a seller in Taiwan or Korea but I'm afraid I can't remember his name.
Hey. Regarding flames outside the mantle. Reinhard writes: 1.The burner is disassembled or not tightened enough. Have investigated this and sealed with clay from Hytta 2.There is a surplus of fuel. The jet hole is too big. I can not get new jet and needle, but have trying to put brass gauze in the Vaporizer to limit the amount of fuel 3. too small cape. Has changed the mantle to a 500 CP 4. foreign bodies in the mixing tube. Have cleaned the mixing tube so it is completely clean. The result with flames outside the mantle is the same, so it will probably be a lantern which will be separated and used for spare parts. See the picture Thanks for all the great suggestions. Sincerely Tom
@Tom Pedersen The size of the jet, rather than restrictions before the jet, will be the ultimate factor. If everything else is correct, an enlarged jet will make a flame outside the mantle. Tony
@Tony Press Thanks for your reply. I have the same thought, but it's almost impossible to obtain these parts for Maxim 501. If anyone on this site has these parts I would love to hear from them. None of the jets and needles I have fit with the thread. Furthermore, there is the problem that the distance between jet and mixing tube cannot be adjusted on this model. Tom
@Tom Pedersen In this post Ditmar Maxim 501 @Anfeng might be able to help. He obtained a replacement nipple and needle from a supplier in Korea.
