# 6D 61 69 6E 2E 62 73 — File format magic numbers

For 6D 61 69 6E 2E 62 73, offset is 0; extension is mgw; format is Nintendo Game & Watch image file, recorded from its source on 2026-08-03.

- **Hex signature:** 6D 61 69 6E 2E 62 73
- **Offset:** 0
- **Extension:** mgw
- **Format:** Nintendo Game & Watch image file _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> 44 30 30 31 | CD001 | 0x5EAC9 | cdi | CD-i CD image file | 6D 61 69 6E 2E 62 73 | main.bs | 0 | mgw | Nintendo <https://en.wikipedia.org/wiki/Game_&_Watch> Game & Watch image file | 4E 45 53 | NES | 0 | nes | <https://en.wikipedia.org/wiki/Nintendo_Entertainment_System> Nintendo Entertainment System image file | A0 32 41 A0 A0 A0 | 2A | 0x165A4 | d64 | <htt

## Source

- https://en.wikipedia.org/wiki/List_of_file_signatures

Last verified: 2026-08-03. Review by: 2027-08-03.
Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).