Help identifying some crystals

It appears that they are 33.000 MHz & 12.288 MHz A simple crystal tester & frequency counter would mke sure. Used crystal testers were all over the place a couple years ago as pagers became less popular.

was very popular. Ramsey has discontinued this, but still has them listed on their closeout page. There are schematics online to build your own for about $10, or you can pay Ramsey's price.

Can I guess(tm)? Those numbers don't look like individual crystals. The look more like crystal can clock oscillators. No clue who MB might be. The part number looks like something from MMD:

Google finds these parts made by MMD, but I couldn't find the specific part number series listed on their web pile.

MB3050HA33000MHZ = 33.000 MHz MB3100H12288MHZ = 12.288 MHz

Wow - I didn't know if I'd get a response and these are great.

Thanks guys. @Jeff, you are correct that they are 12.288 Mhz and

Ok, so I have about 60,000 of them between the two parts. Any suggestions on what I can do with them or who might be interested in buying them?

Sell them back to the manufactory that made them for perhaps 5-10% of their OEM selling price. They can then run them through their production test and sell them as "remanufactured" parts. It's cheaper for them to buy them back than to make new components. One of my friends was fairly successful at doing this before 2000 when the economy was better. No clue if it will work today. Otherwise, contact a components broker and see if they're interested.