**Summary**: For sale is a Longines Master Retrograde Seconds model, reference number L2.715.4.78.6. This model is the very rare variant with Arabic, not Roman, numerals. This model is no longer sold and has been out of production for many years, but remains one of Longines's most complicated and beautiful watches, bearing complications for GMT, retrograde seconds, and retrograde date indications. The dial is at a reasonable 41mm diameter, and is beautifully engraved with a pleasing guilloche pattern. This watch is well-loved, but has never been polished. As such, it can be easily brought back to excellent condition with polishing by a competent watchmaker. The watch bracelet is currently sized for a smaller wrist in its present configuration, but this watch will come with all original spare links. This watch also comes with original cardboard box, presentation box, user manual, polishing cloth. **Price**: $1850. Shipping is $25 in continental US via USPS Priority Mail, signature required. Local sale in Los Angeles area welcome. I accept Zelle, Venmo, and Paypal (+4%). Offers welcome and open to negotiation. **Timestamp** **and larger photo album**: [https://imgur.com/a/PtTYqHC](https://imgur.com/a/PtTYqHC) **Overall condition**: Used but good. No deep scratches or abrasions. Most or all wear can be polished out by a competent watchmaker. See detail photos for reference. **Case/Dial diameter**: 41mm diameter. **Crystal**: sapphire. **Movement**: Longines L698-2 **Strap/bracelet**: OEM Longines bracelet. **Accuracy**: Within COSC and ISO 3159 accuracy ranges. The timegrapher photo is a "best case" reading across 1 minute in dial-up position; your experienced accuracy may vary. But the accuracy snapshot gives you a good idea of what to expect.