Cupboard clear out continues, up here is a nearly full 6oz tub of Pecard Antique Leather Dressing that I bought a few years ago to restore a WW2 flight jacket.I'd say there's about 90% left it weight 5.4oz with the tub.

Very hard to find in the UK (£36 on Amazon)

About this item
Rejuvenates antique leather, restoring flexibility & reviving color

Prevents further damage, cracking or flaking
Safe and gentle for even the oldest of antiquities
Leather Care Made in the USA Since 1902. Best Leather Conditioner for Vintage and New Leather Apparel, Furniture, Auto Interiors, Shoes, Bags and Accessories.

This dressing shows its’ conditioning potential on leather that’s older than the 1970’s. Note that once leather is cracked there is no way to fix the leather fibres. Cracking and flaking is due to loss of natural oils over time causing the leather fibres to shorten and stiffen. Oils in the Pecard Antique Leather Dressing return this essential requirement to the leather, allowing the fibres to perk up and prevent further damage. Pecard Antique Leather Dressing can also be applied to new oil tanned leather to repel harmful dirt and water. This speciality formulated blend of waxes includes beeswax, USP Grade Petroleum products and contains NO animal fat or tallow, mink oil, lanolin, or neatsfoot oil. May darken leather a shade but not significantly. Not recommended for Suede or NuBuck leather.