Seiko SKX013 K2

I have a Seiko SKX013 which I purchased in 2019. This year I noticed that it was running a bit slower and I sent it to Seiko for a check up and it works fine now. See pictures. Factory specs are:

• Full reference: SKX013K2
• Case material: Stainless Steel
• Case diameter: 37 mm
• Lug width: 20 mm
• Lug-to-lug length: 43 mm
• Thickness: 13 mm
• Movement: 7s26 (non-hackable)
• Power reserve: 41 h
• Frequency: 21,600 bph
• Manual wind: None
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  I am looking for £220 and for now just UK sales. I will cover the postage costs. Any questions please PM me. Unfortunately this is the first time I am selling a watch on OF.
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  Thank you to OF!