Notifications
Clear all

Diana Model 15 - Advice Needed (pics included)  

  RSS
Nickq1990
(@nickq1990)
Member Registered

Hello,

Im looking for some advice on an old 1958 Diana model 15. Does anyone here have specific knowledge on the model 15 that would be willing to share their knowledge. Would be really appreciated as I have trawled the web looking for info and seem to be hitting dead ends or contradictions.

1) A few issues I have is I am being told it may be a "Milbro g15" version so parts may be different from  Diana mod 15?

2) One of the rivets on the stock is loose... would you suggest re-hammering to try and tighten? 

3) The flathead bolts have a nut on the opposing side which I can only describe as slotted. Is their a tool for undoing these or any trick?

4) Suggestions on cleaning up the rust? Does tinplate react differently and need a softer touch?

5) What would be the best way to get the stock back to its original "dark finish"? Oil, stain, varnish?

6) The barrel likes to drop loose has a poor hold.. would this be the pin it pivots on or the "hook"?

Sorry for all the questions!

Thanks in advance.

 







Quote
Posted : 7th July 2020 15:14
Garvin
(@garvin)
Curator in Chief Admin

Rough answers until a real expert comes along:

 

1) A few issues I have is I am being told it may be a "Milbro g15" version so parts may be different from  Diana mod 15?

As far as I know these are the same as the Diana-made version. They were certainly based on the Diana designs and used the same prewar machinery. The Milbro parts diagram is here:

and the Diana one here (Chambers version):

 

2) One of the rivets on the stock is loose... would you suggest re-hammering to try and tighten? 

I think hammering is probably the only way, but be aware that the rivet hole in the wood itself may be enlarged. I had a Diana 20 tinplate with a loose stock and I suspect this was the case. If you want to do a really professional job, drillling out the factory rivets and filling the wood holes may be your best option - but a big job for a cheapie gun...

 

3) The flathead bolts have a nut on the opposing side which I can only describe as slotted. Is their a tool for undoing these or any trick?

Don't know.

 

4) Suggestions on cleaning up the rust? Does tinplate react differently and need a softer touch?

I think the blueing adhered to the steel in the same way. But I would use 0000 extra fine wire wool lubricated with oil just the same.

 

5) What would be the best way to get the stock back to its original "dark finish"? Oil, stain, varnish?

Varnish can make the finish a bit shiny - the original finish would probably have been lacquer of some sort. That said, be careful because exposed beech is very light so maybe stained varnish is best, perhaps 'deadened' with a fine wire wool rub? (I'm no expert on wood finishing).

 

6) The barrel likes to drop loose has a poor hold.. would this be the pin it pivots on or the "hook"?

This is possibly not the pivot bolt but a worn breech closing mechanism, I'm guessing, maybe a tired 'hook' spring? You may be able to close up the 'hook' somehow to tighten things up? Or you maybe able to 'pack' the breech seal?

The patent for this lock up design is here:

https://forum.vintageairgunsgallery.com/vintage-diana-resources/diana-airguns-mayer-and-grammelspacher-patents/#post-2231

ReplyQuote
Posted : 7th July 2020 16:43
Nickq1990
(@nickq1990)
Member Registered

@garvin thank you very much for your time taken to reply in such a helpful way. Lots of info to think about. I appriciate the value of this is low but that isnt why we do these things is it ;). For me its a piece of history especially around the fact its a juniors piece which in todays society is not a usually sight. Also I find the pre&post war "hand over" just as interesting. I would love to get it to a fuctional and presentable state keeping it as original as possible regardless of its monetary value.

Again thanks for your response and I welcome any more!

ReplyQuote
Posted : 8th July 2020 01:02
Nickq1990
(@nickq1990)
Member Registered

@garvin from what I can see the Breech locking mech doesnt have any form of spring and from all the parts list the only springs I can see are trigger and main. This doesnt make sense to me in practice as something must secure the hook to the pivot pin but I just cant see a spring mentioned or with my own eyes (although its not in pieces yet) Could it be just a simple hook over a pin? 

Cheers

ReplyQuote
Posted : 8th July 2020 01:10
Garvin
(@garvin)
Curator in Chief Admin

@nickq1990

Nick I got the spring idea looking at this diagram (see UL102 unit):

ReplyQuote
Posted : 8th July 2020 16:19
Nickq1990
(@nickq1990)
Member Registered

@garvin ahh damn.. completely missed that. Thanks for pointing it out.

ReplyQuote
Posted : 8th July 2020 18:04