I'm with Ed. 501s are better - much better, if a little larger. Do NOT get an ITT 601 they had, as I recall an Electronic interruptor that lasted no more then 6 months.

However 501s from, ITT, WECO, S-C, AE, were all good - and practically interchangeable.

$75.00 (plus shipping) is probably top end for a 551, though you might need a ringing generator on top of that.


Sam

"Where are we going and why are we in this hand basket?"