The No. 7E in the ad was $350 plus about $60 extra for the vent rib and beavertail. Of the five No. 7E NIDs I've recorded (three 12-gauge, two 20-gauge and one 28-gauge) all have beavertails.
too bad ithaca classic doubles did not offer field grade guns...with the lower priced guns, they might have generated the sales volume necessary to make a successful business...