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Casio AD-301 Speed Memo homages

No homage of the Casio AD-301 Speed Memo is on Bewrist yet.

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Casio AD-301 Speed Memo, generic case outline. Width unknown, 40 mm placeholder.
Drawn as a case outline.

Original specifications

Sizes and specifications apply to the version named below. Other versions can differ.

Casio AD-301 Speed Memo

Casio QW-1391 service manual cover explicitly pairs AD-301 with module QW-1391. Seller dimension claims remain specimen/product-record evidence.

Specifications for Casio AD-301 Speed Memo
SpecificationValueSources and notes
Case width42 mmCasio AD-301 Speed Memory Ana-Digi | eBay product page

One cited source.

AD-301/1391 record reports 42 mm; another exact AD-301 Speed Memory listing reports 43 mm. Keep the 43 mm alternate observation.

Sources differ

Two exact AD-301 marketplace records disagree; neither provides a factory measurement basis.

Lug to lugNot confirmedCasio QW1391 service manual | ManualsCenterVintage Casio AD-301 Speed Memory Ana-Digi | eBayCasio AD-301 Speed Memory Ana-Digi | eBay product pagemarketplace.watchcharts.comwww.watchonom.com

Three field-specific angles checked across Casio service documentation, exact vintage seller/owner listings, collector searches, and replacement strap fitment. None reports the endpoints of the AD-301 case lugs.

Thickness12 mmCasio AD-301 product record | eBay Germany

One cited source.

One AD-301 product record reports 12 mm case thickness; the record gives no caliper convention.

Lug width19 mmVintage Casio AD-301 Speed Memory Ana-Digi | eBayReplacement strap fit for Casio AD-301 | Watchonom

Sources agree.

Exact AD-301 seller and a strap compatibility table both specify 19 mm. A different eBay product record says 18 mm; retained as an alternate.

Sources differ

Two exact AD-301 marketplace records disagree; neither provides a factory measurement basis.

Sources and unconfirmed details
  • Case dimensions and exact module assignment remain unresolved; no specifications selected from the service-manual search result.

More about the AD-301 Speed Memo

Compared and not keptOne watch left off the bench, with the reason

This watch was compared with the Casio AD-301 Speed Memo and left off the bench.