I believe they were consistent with the first house address on 435 Mapleton Drive but in the last season they aren't consistent.

In Mistaken Identity Richard, pretending to be Beaver, tells the cop he lives at 211 Pine Avenue and in Beaver's Birthday he has to verify his address in order to get the registered letter. He says 211 Pine Avenue. In Beaver's Long Night when he calls the cops on Lumpy and Bill (Scott) he gives the address as 211 Pine Street.

Any other address inconsistencies?

Didn't they show the address on the threatening letter from the modeling agency? Does anyone remember what it said on that?

It seems the longer a show is on TV the less they care about continuity issues!

In an address it always says Mayfield with no state. I believe they get the address right. Wonder what the modeling company was called. Universal? Acme? International? Continental?

It probably wasn't Acme. Only Wile E. Coyote dealt with that company.

I just checked the model agency episode. The address on the letter shows "211 Pine Avenue", no state, of course. The letter doesn't show the name of the agency.

Acme Products was the perfume they had to sell, Flower of the Orient. I thought it was Continental Modeling? Was it Marathon Record Company?