Aventi, A-11, Pure Sapphire, Tourbillon, ca 2020.
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Packaging and insurance
All items sent from Bukowskis are fully insured and carefully inserted in discreet packaging to protect your unique item.
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When the payment is settled, you're welcome to book transport on My Pages
When will my item be delivered?
Your order will be prepared within 2-5 days after the transport is booked. You will receive a message by mail, text or phone when your item is on its way. Please note, when making payment via Klarna, that the address for home delivery must be the same as your invoicing address.
For condition report contact specialist
Size: 48.5 x 55.5 mm
Material: sapphire crystal
Movement: manual
Year: circa 2020
Crystal: sapphire crystal
Bracelet: silicone strap, original titanium buckle
Reference number: A11-01
Case number: A18f7633e1
Accompanied by: certificate, box, outer box
Extra leather strap with original buckle included. The general impression is very good.
The movement is running at the time of cataloguing, Bukowskis does not guarantee the future function of the movement. Please note that the movement has not been tested for timekeeping accuracy and may need a service at the buyer's expense. Watches have been opened to examine movements therefore no warranties are made that the watches are water-resistant. Potential buyers should inspect each watch to satisfy themselves as to condition. For more information, please read our Conditions of Purchase.
More information
The Aventi A-11 Pure Sapphire is a technically ambitious timepiece defined by its full sapphire crystal case—crafted from A-Grade sapphire with 124 edges and 92 facets. The production process involves over 100 hours of precision CNC machining and polishing, overcoming sapphire's inherent brittleness. The case is paired with a Grade 5 titanium crown and a transparent strap, resulting in a structurally rigid yet visually striking composition. The dimensions (55.5mm × 48.5mm × 13mm) make it large on the wrist, though its ergonomically curved case and light materials enhance wearability. Swiss Super-LumiNova BGW9 X1 has been applied both on the dial and internally within the sapphire structure, ensuring strong luminosity in low-light conditions.
Inside, the watch houses a manually wound skeletonized tourbillon movement produced in collaboration with PTS Resources. It beats at 28,800 vph (4 Hz), contains 25 jewels, and offers a 72-hour power reserve. The tourbillon—traditionally used to counteract the effects of gravity on timekeeping—reinforces the mechanical pedigree of the A-11. Aventi bypasses traditional sales channels and instead uses a direct-to-consumer model, allowing it to offer this sapphire-case, tourbillon-equipped watch at a notably lower price than competitors using similar materials and complications. The A-11 is not a limited edition, but its production remains low due to the complexity of sapphire manufacturing.