Here's my PSPs, top i bought back in 2008 modded and still on 5.00m33-6 but it's missing the kratos battery cover the other my brother got it for me for xmas this
Playstation Portable PSP 1001 5.00 m33-6 with extras | #1789667488
Downgrading PSP 3000! - Instructables
PlayStation Portable - Wikipedia
Help me with a softbricked psp (5.00 m33-6), please!!! : r/PSP
PSP (M33 CFW/MMS/Pandora/CXMB & PSX) Guide 1.5.0 | PDF | Usb Flash Drive | Computer File