Double Precancel On A Dated Denver Stamp.

Just searching through a pile of stamps found a stamp with a double precancel from Denver. Looks to be a normal PSS 71 cancel with a PSS L-11 IHS dated Mongomery Ward cancel as well on the stamp. Did / was Mongomery Ward allowed to precancel stamps with a town name in addition to just the date used and is this rare.

A photo will help explain what you mean by a double precancel. As in the example below, the MW datestamp should always appear along with a town name precancel, not by itself, if that is what you mean. The Denver precancel and/or MW datestamp may be stamped twice (doubled) and that is uncommon but wouldn't be described as rare or valuable.

This is what I have. It looks like MW printed their own Date, Town, & State on top of an already printed 71. Have one similar from Chicago with a double precancel
Or did the post office print it for them?

Ah, now I see what you mean, thanks for the picture. That is unusual, I've never seen one like that before, but that's not saying much. I collect precancels but not an expert so cannot comment on its scarcity.

I am like you. I just got a bunch of stamps from an older collectors collection and I am finding some anomalies to the PSS catalog I have. Its from 1990. But from what I have been able to find out there are lots of variants to collecting these stamps. I am just taking my best guess and will be posting some of my conundrums in the future. Thanks for your input.

Those are an example of someone in the Montgomery Ward mailroom being lazy. They are using the handstamp integral precancel (normally used for unprecanceled stamps received as payment) to add a date to the bureau precancel...
The integral is listed as a separate type in the T&T catalog when it it known on otherwise unprecanceled stamps - in that case it is the precancel. If it is only known on previously precanceled stamps, it is listed as a dating device (either in the printed or handstamp dated references), instead of being listed as a separate type.