Leather / Waxed canvas backpacks with a sternum strap / chest strap (for example treesizeverse)

[TartuWolf]

As I like leather boots, leather jackets, heavy cargo pants and denim..
I've been looking for a nice waxed canvas / leather backpack for some time now.
I don't want to deal with all the cheap knockoffs from China.
And I have one very strict requirement - it needs to have a sternum strap.
Once I started using them there's no going back - it's an absolutely essential feature for me.
Overall I've been using the helly hansen stockholm backpack for all of my needs, but I'd still like to find something more "heritage"-y.

So far the best option I found is this maker:
https://www.treesizeverse.com/
Seems like a small one-man opeartion in Belgium (great for me since I'm in the EU).
He explicitly has a sternum strap option:
https://www.treesizeverse.com/product/adding-a-leather-sternum-strap-to-my-backpack
And it seems like he makes one off custom backpacks meaning they should be very configurable in all ways.
I've reached out to him to see if he would take an order from me, how much would it cost etc.. Prices seem to be around 150-300eur depending on the size. I guess I'd be ok going up to 300eur if I get a good custom experience and a nice handmade custom backpack.

I'll report back how this endevour goes, but maybe some folks here have experience with this topic?
Maybe you know some other small makers in EU that make stuff like this?

Some of his work that I like:

 

[Zoro]

I think Thedi could do it, like this one in their website:

It doesn't have the chest strap but that should be a very easy thing to add.

Personally, though, when it comes to backpacks I rather the gorpcore over the heritage, so I choose Patagonia and their Ironclad warranty.

 

[barnabus]

View attachment 794620

I like this one very much.

That said, I went for utility and robustness over style when I chose a rucksack recently. I use a black military cordura pack with molle webbing. Utterly indestructible, sternum strap and a waist strap too.

But there's nothing heritage about that!