(as) sound as a bell (или as a roach)

‘Nessie doesn't take after you, Mr. Brodie,’ remarked the first speaker. ‘She doesna look too strong!’ Brodie glowered at him, exclaiming angrily: ‘She's as sound as a bell.’ (A. J. Cronin, ‘Hatter's Castle’, book III, ch. 4) — - Несси не в вас, мистер Броуди, - сказал первый клерк. - Она выглядит не особенно крепкой. Броуди сердито посмотрел на него: - У нее прекрасное здоровье.

I got a gutful of gas at that bloody war. My heart was as sound as a bell before I went there. (A. Marshall, ‘How's Andy Going?’, ‘Cardiac’) — На этой проклятой войне я отравился газом. До войны сердце у меня было прекрасное.