IPSW Portal

Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 5.3 (16U5558b) for Apple Watch Series 1 (38mm)

Version:	5.3
Build:	16U5558b
Signed:	No
Size:	0.44 GB
Release Date:	2019-06-24 17:24:52
Upload Date:	2019-06-20 21:21:54

Secure download directly from Apple's servers