At Knox Safe Custody, our Size G Safe Deposit Box the most generous storage capacity in our range. Built for clients who require substantial space for high-value collections, multi-generational heirlooms, or diverse asset categories. Situated within our climate-controlled vault in Houghton, Johannesburg – Every Knox safe deposit box includes R1 million in insurance cover as part of the rental fee. Clients can purchase additional cover to increase the total insured amount to a maximum of R5 million per box. All cover is subject to the applicable policy’s terms, conditions, limits and exclusions.

This size is ideal for storing:

• Multiple jewellery chests, premium watch cases, and curated heirloom sets
• Large bullion bar boxes, monster boxes, and significant multi-metal holdings
• Oversized binders, corporate records, property files, and estate portfolios
• Collectibles such as rare manuscripts, boxed coin sets, or high-value artefacts
• Advanced digital storage systems, hard-drive arrays, and long-term archival media

Size G is designed for clients who require the highest level of volume, flexibility, and privacy — all within a fully insured, specialist environment built for long-term preservation. It is the ultimate choice when safeguarding significant personal or investment assets with complete confidence.