Found this pipe at an antique shop and can't find any information about it.

By the COM stamp, it appears to be a later Comoy made pipe. Seconds line.
http://pipephil.eu/logos/en/logo-comoy.html

I'm wondering if that's the original stem. Seems a little off. A lot of the London Crowns I've seen have a matching crown on the stem identical to the one over the London Crown logo stamp. That "L" looks like is could be on a stem made by Palmerston.
http://www.pipephil.eu/logos/en/logo-p1.html#palmerston

Who Made That Pipe lists London Crown's maker as unknown. The COM stamp isn't the same as the Comoy pictured. Different font, letters in different sizes and weights. Also, "Made in London England" was used by more than one maker. Barling used it during the '30's and '40's. The "L" on the shank does look like Palmerston, and the fit is a bit dodgy, although that in itself isn't proof of the stem being from another pipe. Nothing about it on Pipedia at all. Given that it says "Made In London England" it seems unlikely to be A. Lacroix.
Worthpoint has a listing for a London Crown with a completely different crown logo. That pipe is claimed by the seller to be by Parker/Hardcastle, but there's nothing to connect the pipe to that attribution. Hardcastle's crown logo is also completely different. The two ads I've found for London Crown pipes date to 1962-3, but access to a full scale view IS dodgy on one site and the other site requires a paid subscription.
Nice shaping to the pipe.

The crown looks a lot like the ones from Oxford pipes. You might check them out on pipephil.

Handsome straight Dublin, nice proportions and balance. The Brits do wonders with the traditional shapes. And what a deal on that one! Yeah, eight bucks is less than a trip to the local ice cream stand.