25 Pounder info needed.

[Private_collector]

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Template for the lid canvas had to be altered. My roll of canvas has a slight stretch to it, and to be sure the finished product looked right, I had to reduce template dimensions to accomodate the stretch. I really can't tell yet if canvas stretch property is going to be a good thing or a bad thing. We'll find out when I go to fit canvas to the lid! Not the best moment for that discovery, so I could get all the hard work done, only to find I have wasted my time entirely. If that happens, I can enlarge the template back to 'no stretch' size and give the job to my local upholstery guys.
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Discovered some very interesting facts about original canvas. Firstly, it wasn't colored until after it was on the lid and the leather edge strip was in place. Although it was colored insitu, that occured before the two timber blocks were screwed down. Also, the skirt around the edges, being double layered, folds back up and under the top layer BUT is not sewn anywhere except the corners. Instead, it is the tacks along the leather stip do that job. Original canvas is a very coarse weave that would have made waterproofing difficult, and because of all the perforations from fitting, I suspect the waterproofing may have occured with application of the color.
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Around the edge of the lid, a leather strip was fastened with a large amount of upholstery cut tacks. They were approx 1" apart, with some put along the canvas berore leather was put in place. Guess this was to hold canvas securely prior to tacking the leather strip. There were 2 sizes of cut tacks used. Some are 3/8", some are just over 3/4". There is no pattern to which were used where, as far as I could tell. Long ones weren't used in corners, nor were they spaced along the sides amongst the short ones, with any discernible order. For replacement, I have ordered the larger size only, because I'm intending to use the original holes. Also ordered a propper tack hammer for the task. The new leather strip is vegetable tanned, as the original would have been, and should arrive sometime this week.
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Instead of going on with canvas work last night, I put some time into reproducing the markings on the box. Not as straight forward as I had hoped. Some characters in one font looked correct, some didn't. Other characters from another font looked right, others were wrong. In short, I used characters of 4 different fonts to make one set of markings. Even the '&' symbol had to be searched for. Most military style stencils I have on file, do not have that symbol, so getting something passable became the goal. I think the finished product will look reasonably presentable, although not identical to the original. When you consider the box (and significant pieces of the gun itself) has been completely remade with non genuine color, canvas, leather strap, and metal components that are not painted, etc., the difference in stencil characters really isn't a huge concern!

[rnixartillery]

Tony.

One thing baffles me slightly with this box , I have not seen another with
' Anti tank Guns ' stencilled and I have had dozens of the these boxes through my hands.
We all know the 25 pdr is not an anti tank gun and the majority of these boxes produced ended up on 25 pdr's ,may be its an Australian thing !

Rob......................rnixartillery.

[Private_collector]

That would have been handy to know before I sanded the original markings into oblivion. Still, they're gone now.

If it's of any significance, the date stamped onto one of the lid pieces is, 1953 or possibly 1958.

[Mike Cecil]

The Australian 25-pdr was issued with an Armour Piercing Shot projectile, to be fired using any of three charge values
(1) 'Charge Super' plus increment
(2) 'Charge Super'
(3) Charge 3.

CMF artillery units regularly practiced moving target/anti-tank shooting techniques on the anti-armour range at Puckapunyal up into the early 1960s. The Australian 25-pdr handbooks of the 1950s include descriptions of the AP Shot round and the EFCs that each powder type & quantity resulted in.

An AP Shot may only have 'annoyed' a T-54 or Type 59, but smaller vehicles like APCs would still get a quite a shock from one.

The label was common on these Australian-made boxes of the period.

Mike

[Private_collector]

Another nice 25 pdr reference book arrived today.
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Lots of useful information, and pictures to help it all make sense.
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The last image is particularly useful right now!

[Private_collector]

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The canvas for the tool box lid is now finished.
A single stitch run has been run along all sides, beneath where the leather strip will go, to keep the edges fairly straight. Before it's completely tacked in place, I'll iron the edges and apply some spray starch to help the edges retain their shape.

Incidentally, I have not made any attempt to clean inside of the box itself, but did clean inside the lid. Sandblasting isn't just for metal! The lid will need another blasting before reassembly. It has some PVA glue residue to come off.

[Private_collector]

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New leather strip for the tool box lid has now arrived.
It was custom made and sent within 2-3 days, by an Australian business that I will definately use again. I can think of several areas that will require custom made leather pieces, including straps for the sunshine roof on my CMP.
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My cut tacks are here now too. This is equivelent to the larger of the sizes originally used, and they are SHARP! I'll do a test hammer through the end of my leather strip, to see how easy they drive and what, if anything, happens to the leather. It's a good thickness so hopefully they won't distort on the way through. If they do, every hole will need to be punched, or have an awl poked through.
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I've been cleaning up all the screw heads by sanding to shiny, then applying two layers of gun blue. They should look quite nice when finished, and will match the brackets and hinges. I know it's a lot of work, but I thought they came up well.....until I took the closeup photo. Now I can see there is still grot in several of the grooves. Those will get another run through with sandpaper. I'm sure my eyesight is getting worse.

If the good lords willing and the creeks don't rise, I should have color on the box itself this weekend, and the lid should be completely finished.