Will the Lathem ribbon fit my time clock?

Only if it is a Lathem time clock that takes a 1-inch ribbon. It is not made for calculators or other brands of clock.

Will the Monroe P65M fit my calculator?

Monroe says it fits nearly all Monroe models plus many other makes. Check your model against Monroe's compatibility list before buying.

Which ribbon lasts longer?

The Monroe is a twin-spool ribbon loaded with a high ink volume, but some buyers say it does not last as long as it used to. Monroe suggests changing it after every 3 paper tape rolls. No life figure is given for the Lathem.

Is the Monroe P65M worth $39.00?

It is the only new price listed as of November 3, 2026, so there is no cheaper store to compare against. Buy it if you need spools for a Monroe calculator; the Lathem ribbon is not a substitute.

Is the Lathem ribbon black/red or blue?

The product name says black/red, but the listed specs say blue. Confirm the color with the seller before ordering if the color matters.

Can I use one ribbon in both devices?

No. The Lathem is a 1-inch time-clock ribbon and the Monroe is a calculator spool set. Each fits only its own type of machine.

Lathem 1" Two-Color Ribbon (Black/Red) for Time Clocks vs Monroe P65M Premium Printing Calculator Ink Ribbon Spools

These are not interchangeable: the Lathem ribbon is a 1-inch nylon time-clock ribbon, and the Monroe P65M is a twin-spool ink ribbon for printing calculators. Buy the Lathem if you own a Lathem time clock that takes a 1-inch ribbon. Buy the Monroe P65M if you need spools for a Monroe or other printing calculator. The Monroe is $39.00 at Monroe Systems for Business as of November 3, 2026; no price was given for the Lathem.

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