Before buying a used ‘On The Fly’ Extension Link, establish the exact version, the watch and bracelet it was supplied for, its condition and the fittings included in the sale. Steel Reef makes different versions for different bracelet arrangements. A listing described only as a “Steel Reef link” does not give you enough information to judge whether it is the right component for your watch.
Ask for the Product Identity Before Discussing Fit
A useful second-hand listing should identify more than the watch brand. Ask for the original product description or order information showing the model option, with personal details removed.
That helps distinguish On The Fly from other Steel Reef products. A fixed half link and an adjustable extension have different purposes, while SwiftLink is a separate product family. Sellers may use “extension”, “micro-adjust” and “link” loosely, so begin by establishing what is actually being offered.
Also ask which watch, bracelet and clasp the component was fitted to. If the seller has changed any of those parts, the original watch name may no longer describe the relevant arrangement.
A previous successful installation is useful history. It does not confirm compatibility with your watch on its own.
Compare the Complete Model Description
Use the current On The Fly selector to compare the seller’s information with the option you would choose for your watch.
Read any qualifying text. The Sinn range, for example, includes bracelet-specific restrictions and finish notes. The Longines range separates several Spirit models, and the Zenith range distinguishes Sport, Original and Open. The Rolex range specifies the bracelet reference alongside the watch reference - an Oyster and a Jubilee on the same model are different bracelets, and a used link supplied for one will not necessarily suit the other. It also separates by steel grade, so a seller describing a used link only as “for a Submariner” is leaving out information that matters; for more on why steel grade is relevant, see our 316L vs 904L steel guide. Tudor listings are organised by model and reference number - if a seller describes a used link only as “for a Black Bay” without a reference, that is not enough to establish the right version.
The same applies if you are moving a link between watches you already own. Ownership removes the buying decision, but it does not remove the compatibility check.
Request Photographs That Answer Practical Questions
A clear photograph of the component on its own is useful, but a few additional views can resolve questions that a single polished sales image cannot.
Ask for:
- The actual component from above, below and the side.
- The connection points and any screws, pins or other fittings included.
- The component in its shorter and extended configurations, where applicable.
- The bracelet and open clasp it was fitted to, if still available.
- Any visible marks, damaged fasteners or changes made since purchase.
The photographs should show the item being sold, rather than only images copied from a product page. They can help identify the component and reveal reasons to ask more questions. They cannot establish remaining service life or prove that a mechanism is secure. If the condition is uncertain, have it assessed before fitting or wearing it.
Check Which Fittings Are Included
Different versions do not necessarily use the same installation hardware.
The Longines compatible 'On The Fly' link requires installation using a supplied friction pin and a pin-pusher tool, while the Sinn H-Link 'On The Fly' link requires a screw, pin and hex key set. Rolex and Tudor compatible 'On The Fly' links require screw pins.
Establish which parts are required for the particular version, which come with the used item and which belong to the receiving bracelet.
Ask About Use and Alterations
Ask the seller whether the component has been polished, refinished, repaired or otherwise altered, and whether they noticed any difficulty with its operation or attachment.
A description such as “lightly used” does not answer those questions. Nor does an attractive finish explain the condition of the working parts.
If something does not align or operate as expected, stop before proceeding. Filing a connection, forcing a fastener or modifying the mechanism to make an uncertain purchase fit creates a new problem rather than resolving the original uncertainty.
Keep any original parts removed from your own bracelet. They belong with the watch and may be needed when the accessory is removed or the setup is reconsidered.
Compare the Real Saving
Assess the used price alongside any missing fittings, installation help or unresolved identification work. A small reduction may be less attractive if the component’s version or condition remains unclear.
Check the seller’s terms separately. Do not assume that buying an accessory second-hand gives you the same purchase terms as buying it new.
Make Uncertainty the Question, Not the Installation Method
A used 'On The Fly' link is easiest to assess when its identity, included parts and history are clear. If any of those remain uncertain, gather the missing information before fitting it.
To compare against the current range, view the 'On The Fly' model options.
Steel Reef is not affiliated with any watch brand.
