The André Thorburn L48 Flipper is a pre-owned mint South African custom folding knife with carbon fiber scales, hand-engraved zirconium bolsters, a Bohler N690 blade, and exceptionally smooth IKBS bearing action. This handmade, one-of-a-kind custom folder was purchased from a collector as part of a partial collection sale.
The result is refined, mechanical, and highly collectible. The carbon fiber handle keeps the knife light at only 3.60 ounces, while the engraved zirconium bolsters add dramatic texture and high-end material contrast. Meanwhile, the IKBS bearing system gives the L48 the fast, glass-smooth action André Thorburn flippers are known for.
André Thorburn L48 Flipper With N690 Blade
The André Thorburn L48 Flipper features a hollow-ground Bohler N690 stainless steel blade with a 3.30-inch blade length and a 3.30-inch cutting edge. The blade is perfectly centered, and the clean grind lines give the knife a crisp, controlled custom profile.
N690 is a respected stainless blade steel known for taking a fine edge, holding that edge well, and offering good toughness for a high-performance custom folder. In addition, the hollow grind makes the cutting edge efficient and easy to maintain.
Deployment is handled through the flipper tab. Because this knife runs on the Ikoma Korth Bearing System, the action is exceptionally smooth and fast. The IKBS system uses ball bearings to reduce friction and support clean deployment with no blade play.
Carbon Fiber, Zirconium, and Anodized Titanium Details
The handle scales are carbon fiber set on anodized titanium. This gives the knife a lightweight feel, a clean technical look, and a secure shape in hand. The handle measures 4.30 inches closed, so the knife remains compact while still offering full custom presence.
The zirconium bolsters are a major highlight. They are differentially anodized, engraved, and textured by Marietjie Thorburn. As a result, the bolster work adds both grip and artistry. The engraved pattern shows fine detail, while the anodized finish brings subtle blue and purple highlights under changing light.
The titanium liners are fileworked and anodized blue on the flats with purple on the bevels. Red fiber spacers add contrast along the spine, while the G10 backspacer keeps the construction clean and strong. Finally, the pierced Ti-AlN coated titanium pocket clip is set up for right-side, tip-up carry.
South African Custom Knife Craftsmanship
André Thorburn is one of South Africa’s most respected custom knifemakers. He is known for elegant liner lock folders, smooth IKBS flippers, precise fit, and high-end embellishment. His work often blends refined dress-knife details with practical folding-knife mechanics.
The L48 reflects that balance well. It has a clean blade profile, comfortable handle, excellent centering, and standout material work. However, it also avoids unnecessary bulk. At 7.60 inches overall and 3.60 ounces, it sits in a highly usable size range for a premium custom folder.
The combination of N690, engraved zirconium, carbon fiber, anodized titanium liners, and IKBS action makes this piece especially strong for collectors who appreciate South African custom knives. It also offers the mechanical feel that serious flipper collectors look for.
Specifications:
Maker: André E. Thorburn
Model: L48 Flipper
Condition: Pre-Owned, Mint
Source: Purchased from a collector as part of a partial collection sale
Knife Type: Handmade One-of-a-Kind Custom Folding Knife
Style: IKBS Flipper with Locking Liner
Blade Steel: Bohler N690 Stainless Steel
Blade Grind: Hollow Ground
Blade Length: 3.30″
Cutting Edge Length: 3.30″
Overall Length: 7.60″
Blade Height at Heel: 0.95″
Blade Thickness Near Bolster: 0.13″
Blade Thickness at Midpoint: 0.11″
Blade Thickness Near Tip: 0.03″
Closed Length: 4.30″
Item Weight: 3.60 oz.
Shipment Weight: 4.40 oz.
Bolsters: Differentially anodized and engraved zirconium
Handle: Carbon fiber set on anodized titanium
Liners: Fileworked titanium, anodized blue on flats and purple on bevels
Backspacer: G10 with red fiber spacers
Pocket Clip: Pierced Ti-AlN coated titanium, right-side tip-up carry
Bearing System: IKBS
Included: Cordura pouch and provenance documentation
Video Introduction: Thorburn L48 Flipper
This André Thorburn L48 Flipper is a pre-owned mint South African custom folding knife with a Bohler N690 blade, carbon fiber scales, hand-engraved zirconium bolsters, anodized titanium liners, and smooth IKBS bearing action. Lightweight at 3.60 ounces and measuring 7.60 inches overall, this handmade one-of-a-kind custom folder delivers the refined action and collector-grade finish André Thorburn knives are known for.
Collector Appeal
Collectors looking for an André Thorburn custom flipper should give this L48 serious attention. It brings together a respected maker, one-of-a-kind handmade construction, IKBS action, engraved zirconium bolsters, carbon fiber scales, and mint pre-owned condition.
This knife is especially appealing for collectors who appreciate smooth action, lightweight carbon fiber, hand engraving, anodized titanium detail, and South African custom folder craftsmanship. In addition, the included Cordura pouch adds useful original-style storage and presentation value.
Collectors comparing this piece can start with André Thorburn Custom Knives brand page for more unique knives from this fantastic knifemaker. From there, Preowned Knives helps compare other collector-owned custom folders, while Folding Knives gives a broader look at current premium folder inventory. For buying education, How to Choose a Custom Knife offers helpful collector guidance, and collectors considering a sale can review Sell Your Knife Collection and What We Buy to see how We Buy Knife Collections evaluates rarity, condition, materials, documentation, and market demand.
We Buy Knife Collections is proud to support the American Knife & Tool Institute and its work for knife owners, knife makers, and the future of the knife industry through AKTI Premier Membership: https://www.akti.org/news/premium-knife-dealer-boosts-support-of-akti/
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