Seiko 399 / SR927W Silver Oxide Watch Battery

Special Price £3.30 Regular price £5.99 GBP

Overview

SIZE	XXS	XS	S	M	L	XL	XXL
UK	2	4	6	8	10	12	14
EU	30	32	34	36	38	40	42
US	00	0	2	4	6	8	10
FRANCE/SPAIN	30	32	34	36	38	40	42
GERMANY	28	30	32	34	36	38	40
ITALY	34	36	38	40	42	44	46
JAPAN	1	3	5	7	9	11	13
KOREA	33	44	55	66	77	88	99

Jeans & Trousers

SIZE	XXS	XS	S	M	L	XL	XXL
BUST	30	32	34	36	38	40	42
WAIST	25	27	29	31	33	35	37
HIPS	36	38	40	42	44	46	48
LEG	32	34	36	38	40	42	44

Shoes

EU	35	36	37	38	39	40	41	42	43	44	45
US	5	6	6.5	7.5	8.5	9	9.5	10	10.5	12	13
UK	3	4	4.5	5.5	6.5	7	7.5	8	8.5	10	11
MEXICO	-	-	-	4.5	5.5	6	6.5	7	7.5	8	9
JAPAN	21	22	22.5	23	24	25	25.5	26	27	28	29
KOREA	228	235	238	245	251	254	257	260	267	273	279

Belts

SIZE	S	M	L	XL	XXL	XXXL
WAIST	28-30	32-34	36-38	40-42	44-46	48-50
END TO END	41	44	47	51	54	55

Product description

Seiko 399 / SR927W Silver Oxide Watch Battery

Keep your timepiece running accurately with the Seiko 399 / SR927W silver oxide cell. Stable voltage and leak‑resistant design for dependable performance.

Battery size: 399 / SR927W
Chemistry: Silver Oxide
Use: Suitable for a wide range of analogue and digital watches
Shelf life: Fresh stock, typically 3–5 years
Packaging: Single retail pack (brand new, factory sealed)

Tip: Check your existing battery code or watch manual before ordering.

Fast UK dispatch from Chrono Straps UK.

Shipping & Return

Return Policies

Your satisfaction matters to us at Chrono Straps UK. This Refund Policy outlines our simple returns and refund process for watch straps and accessories, so you can shop with confidence knowing your purchase is protected.

We offer a 30-day return policy from the date you receive your goods.

Change of mind: You are responsible for return postage. Goods must be returned in a resaleable condition with original packaging and accessories. You may open and inspect items as you would in a shop, but if goods are used or damaged beyond this, we may deduct an amount from your refund to reflect the loss in value.

Faulty or incorrect items: If your item is defective, damaged or not as described, please contact us within 7 working days of receipt at info@chronostraps.co.uk. We will arrange a refund or replacement and reimburse reasonable return postage costs.

Refunds will be processed within 14 days of us receiving the returned goods (or proof of postage). Please ensure goods are securely packaged and sent using a trackable delivery method. We cannot accept responsibility for returns lost or damaged in transit.

To start a return, please click here with your order number, or you can contact us at info@chronostraps.co.uk.

This 30-day return policy is in addition to your statutory right to cancel within 14 days under the Consumer Contracts Regulations 2013. See our Terms of Service for full details of your statutory rights.

Shipping Policies

Chrono Straps UK offers fast and reliable delivery for all watch straps and accessories. This Shipping Policy provides clear details on our delivery options, estimated timescales, and costs to help you enjoy a smooth shopping experience across the UK and worldwide.

This Shipping Policy forms part of our Terms of Service. By placing an order with Chrono Straps UK, you agree to both this Policy and the Terms of Service.

Shipping & Delivery

We deliver to addresses across the UK, Northern Ireland, Europe and worldwide.

UK & Northern Ireland Delivery

Delivery is typically next working day subject to stock availability, but may take up to 5 working days. Small parcels may be sent via Royal Mail; larger orders via UPS or another courier.

We aim to deliver promptly, and in any event within 30 days of your order being placed, unless a longer timeframe has been agreed with you. Delivery dates are estimates only and delays outside our control (such as courier delays, weather, or customs) may occur.

For security reasons, first-time orders may need to be delivered to the billing address linked to your payment method. Subsequent orders can be delivered to an alternative address of your choice.

Risk of loss or damage passes to you once the goods are delivered to you (or a person nominated by you). Goods will not be left unattended unless you have provided express authorisation.

European & Worldwide Delivery

Orders are shipped via Royal Mail, UPS or DHL. European deliveries typically take up to 10 working days; worldwide up to 20 working days. Delivery times may vary depending on location.

IMPORTANT: If you order from outside the UK, you will be the Importer of Record and responsible for any customs duties, clearance charges and taxes in your country. Please check with your local customs office for details before ordering.

Manufacturer / EU Responsible Person

Manufacturer
Company name
SEIKO Germany, Branch of Seiko Watch Europe S.A.S.
Address
Parsevalstr. 9 a/b, Düsseldorf, 40468, DE
Email
info@seiko.de

EU responsible person
Company name
Seiko Benelux
Address
Daniel Pichotstraat 17-31, Schiedam, 3115 JB, NL
Email
info@seiko.nl