The pill is possibly
Ery-Tab (erythromycin) EC Tab 250 mg
Manufacturer: ABBOTT
Imprint 1: EC
Imprint 2: abbott logo
Color: white
Shape: oval
Coating: enteric-coated
There is an image of this pill at the very bottom of the PDR page for Ery-Tab at Drugs.com
http://www.drugs.com/PDR/Ery_Tab_Tablets.html
Only one side of the pill is pictured (the side with the Abbott logo) so it is worth having a look to see if it is similar to the pill you found.
This drug is a commonly prescribed antibiotic (you'll be pleased to know)
Info at
http://erythromycin.drugs.com